Few wireless applications carry stakes as high as medical radio. A cardiac pacemaker that reports arrhythmia data to a bedside monitor, an implanted insulin pump adjusted through a wireless programmer, a continuous glucose monitor streaming to a phone, a swallowed capsule endoscope transmitting images from inside the body — these devices depend on radio links that must work reliably, at vanishingly low power, in spectrum protected from interference.

India protects this spectrum through a set of dedicated de-licensing notifications issued by the WPC Wing of the Department of Telecommunications. The centrepiece is GSR 673 (E) dated 23.09.2008, which de-licensed the 402–405 MHz Medical Implant Communication Systems (MICS) band, flanked by the 401–402 MHz and 405–406 MHz wing bands and the 2483.5–2500 MHz active-implant band covered by GSR 1047 (E) dated 18.10.2018. Every wireless medical device model using these bands requires WPC Equipment Type Approval (ETA) before it can be imported into or placed on the Indian market — in addition to its medical-device regulatory obligations under CDSCO. This guide explains the medical radio bands available in India, their strict technical conditions, the ETA self-declaration process, and the compliance planning that medical device companies need alongside their clinical regulatory pathway.

India’s De-Licensed Medical Radio Bands

402–405 MHz: The MICS Core Band — GSR 673 (E) dated 23.09.2008

GSR 673 (E) de-licensed 402–405 MHz for very low power remote cardiac monitoring radio frequency wireless medical devices, Medical Implant Communication Systems (MICS), Medical Implant Telemetry Systems (MITS), and other such very low power medical radio frequency wireless devices. The notified conditions are:

• Maximum power of 25 µW e.r.p
• Channel emission bandwidth within 300 kHz
• Built-in antenna

This is the globally harmonised MedRadio/MICS core band used by pacemakers, implantable cardioverter defibrillators (ICDs), neurostimulators, and their external programmers and home monitors. The 25 µW limit — twenty-five millionths of a watt — reflects the band’s purpose: ultra-short-range links between an implant and a nearby controller, coexisting with the meteorological aids services that share this spectrum internationally.

401–402 MHz and 405–406 MHz: The Wing Bands — GSR 1047 (E)

GSR 1047 (E) extends licence-exempt medical use to the wing bands on either side of the MICS core. Both 401–402 MHz and 405–406 MHz are available at 25 µW e.r.p for systems specifically designed for non-voice digital communications between active implantable medical devices and/or body-worn devices and other devices external to the human body, for transferring non-time-critical, individual patient-related physiological information. Conditions include:

• 25 kHz channel spacing, with individual transmitters permitted to combine adjacent channels up to 100 kHz bandwidth
• Alternatively, a duty-cycle limit of 0.1%
• Reference standard: EN 302 537 (Medical Data Service devices)

These bands suit lower-priority telemetry — trend data, device status logs — keeping the core band free for session-based clinical communication.

30–37.5 MHz: Ultra-Low Power Membrane Implants — GSR 1047 (E)

A specialised entry in GSR 1047 (E) covers 30–37.5 MHz at 1 mW e.r.p with a 10% duty-cycle limit, available only for ultra-low power medical membrane implants for blood pressure measurements — implantable pressure sensors within the definition of active implantable medical devices. The reference standard is EN 302 510.

2483.5–2500 MHz: Wideband Active Implants — GSR 1047 (E)

For implant systems needing higher data rates, GSR 1047 (E) de-licensed 2483.5–2500 MHz at 10 mW e.i.r.p for low power active medical implant devices, with 1 MHz channel spacing — the whole band may also be used dynamically as a single channel for high-speed data transmission — and a 10% duty-cycle limit, referencing EN 301 559. This band supports modern implant platforms that upload larger datasets (for example, high-resolution glucose or cardiac waveform histories) in short bursts.

Summary Table

Many connected medical devices also use the general de-licensed bands — Bluetooth LE at 2400–2483.5 MHz under GSR 45 (E) for wearables, glucometers, and patient monitors, and Wi-Fi under GSR 1048 (E) for hospital equipment. Those radios require ETA coverage in the same application.

Which Devices Need WPC ETA?

• External programmers and clinician tablets communicating with implants in the MICS/MedRadio bands — require ETA; these are the transmitters most visibly placed on the market.
• Home monitoring units / bedside transceivers — require ETA.
• Body-worn sensors and patches using 401–406 MHz, 2.4 GHz BLE, or proprietary links — require ETA.
• Active implantable devices themselves (pacemakers, neurostimulators, implanted sensors) — as radio transmitters, the models require type approval coverage; manufacturers should address this within the same ETA planning as their external units.
• Capsule endoscopy systems, wireless telemetry transmitters, patient monitors — require ETA for each transmitting model.
• Hospital equipment with Wi-Fi/Bluetooth (infusion pumps, ventilators, imaging consoles) — the embedded radios require ETA.

Step-by-Step: WPC ETA Self-Declaration for Medical Wireless Devices

Because the medical bands above are de-licensed and the equipment is exempt from import licensing under DGFT policy, wireless medical devices qualify for ETA self-declaration (ETA-SD) via the Saral Sanchar portal.

1. Radio and band audit. Inventory every transmitter in the system — implant, programmer, home monitor, companion app gateway — and map each to its notification and conditions (power, bandwidth, duty cycle, channel spacing).
2. Accredited RF testing. Commission test reports evidencing frequency range, e.r.p/e.i.r.p, occupied bandwidth, and duty-cycle behaviour. EN 302 537, EN 302 510, EN 301 559, and EN 300 328 (for BLE) are the commonly referenced methodologies.
3. Saral Sanchar registration. The Indian importer or Authorised Indian Representative (AIR) of the foreign manufacturer registers as applicant.
4. ETA-SD filing with device details, RF specifications, band and power declarations, test reports, and technical literature.
5. Fee payment — ₹10,000 per application/model online.
6. Certificate download once the ETA is generated.
7. Import with undertaking — ETA plus customs undertaking confirming operation in licence-exempt bands.

Documents Required

• Saral Sanchar ETA-SD application
• Accredited RF test reports for every transmitter in the system
• Technical datasheets: frequency, power, modulation, antenna, duty cycle
• Applicant company documents and IEC
• AIR authorisation letter for foreign manufacturers
• Device description distinguishing implant, body-worn, and external units
• Customs undertaking at import

Common Compliance Pitfalls for Medical Wireless

• Assuming CDSCO covers radio. Medical device registration with CDSCO and WPC ETA are independent obligations. A CDSCO-licensed device without ETA will still be stopped at customs.
• Testing only the flagship unit. Systems ship as kits — implant, programmer, monitor. Each transmitting model needs coverage; the programmer is not evidence for the bedside unit.
• Duty-cycle oversights in the wing bands. The 0.1% alternative condition in 401–402 / 405–406 MHz is easily breached by aggressive retry logic.
• US MedRadio assumptions. The US MedRadio framework (401–406 MHz with different sub-band rules) does not map one-to-one to the Indian notifications; test reports must address the Indian parameters.
• Unmapped companion radios. A “MICS device” whose home monitor also contains LTE for data backhaul brings cellular considerations beyond the SRD framework.
• Antenna changes. The 402–405 MHz condition specifies built-in antennas; hardware variants with external antennas fall outside the notified conditions.

Product Scenarios: How the Rules Apply in Practice

Cardiac rhythm management systems. A pacemaker programme typically involves the implant, a clinic programmer, and a home monitor that uploads nightly telemetry. The session-based clinical link runs in the 402–405 MHz core band under GSR 673 (E) at 25 µW; background telemetry may use the wing bands under the 0.1% duty-cycle alternative. All three transmitting models need coverage, and the home monitor’s cellular backhaul (where present) sits outside the SRD framework and needs its own regulatory treatment.

Continuous glucose monitors and insulin delivery. Modern CGM sensors and pumps predominantly use BLE at 2400–2483.5 MHz, placing them under GSR 45 (E) rather than the MICS bands — a simpler filing, but one that still requires accredited test evidence for each transmitting model (sensor transmitter, pump, dedicated receiver where offered). Systems that pair with phones rely on the phone’s own approvals for that side of the link.

Implantable pressure sensing. The 30–37.5 MHz membrane-implant provision is deliberately narrow: 1 mW e.r.p, 10% duty cycle, and applicability confined to ultra-low power membrane implants for blood-pressure measurement. Manufacturers in this niche should mirror the notification’s wording in their application and ensure the EN 302 510 basis is visible in the test report.

Hospital telemetry and patient monitoring. Multi-parameter monitors, telemetry packs, and central stations mix Wi-Fi (GSR 1048 (E)), BLE, and sometimes proprietary sub-GHz links. Hospital procurement increasingly asks vendors for ETA evidence during tendering, so having certificates ready shortens sales cycles as well as customs clearance.

Capsule endoscopy. Swallowed capsules transmit image data to a body-worn recorder. Both the capsule and the recorder are transmitters requiring coverage, and the very low transmit powers involved make accurate laboratory measurement — and a lab experienced with medical RF — particularly important.

Timeline and Cost Planning for Medical Wireless

The radio approval is rarely the critical path in a medical launch — CDSCO processes take longer — but it becomes the critical path the moment it is forgotten. A sensible sequence: complete the radio inventory during design transfer; commission RF testing alongside (not after) clinical/regulatory documentation preparation; file the ETA-SD (₹10,000 government fee per model) as soon as reports arrive; and hold certificates ready before the first commercial shipment. For a typical system of two to three transmitting models, expect one to three weeks of laboratory work and days of portal processing — a few weeks total, run in parallel with the months-long clinical pathway.

Two cost notes specific to this sector: first, medical RF testing at ultra-low power levels (25 µW e.r.p) demands measurement sensitivity that not every lab offers, so lab selection matters more than in consumer categories; second, multi-model systems multiply fees and reports, so rationalising the number of distinct transmitting SKUs for India simplifies the file and the budget.

The Full Regulatory Stack for Wireless Medical Devices

WPC ETA sits alongside: CDSCO medical device registration/import licence under the Medical Device Rules; BIS CRS registration where applicable to the equipment category; EPR e-waste registration for electronic equipment; EPR for battery waste for battery-powered devices; and Legal Metrology (LMPC) for packaged imports. Because clinical and radio approvals run on different clocks, the compliance plan should start both early — CDSCO timelines dominate, but a missing ETA is the avoidable failure that strands cleared medical shipments at port.

Pre-Market Compliance Checklist for Medical Wireless Systems

Medical device companies run disciplined design-control processes; the radio approval simply needs a place inside them. At design transfer, generate the definitive transmitter inventory — implant, programmer, monitor, patches, gateways — with band, power, bandwidth, duty cycle, and antenna type per unit, and map each row to its Indian notification (GSR 673 (E) for the MICS core, GSR 1047 (E) for the wing bands and 2.4 GHz implant band, GSR 45 (E) for BLE). This one-page RF map becomes the master reference for the ETA filings and every future change assessment.

During verification, commission the RF testing in parallel with electrical safety and EMC work — the same laboratory campaign can often cover all three, and ultra-low-power measurements (25 µW e.r.p) should be scheduled with a lab whose sensitivity floor is confirmed in advance. During regulatory submission, run the WPC track alongside CDSCO rather than after it: the ETA-SD filings are days of portal work once reports exist, and finished certificates strengthen import-licence documentation and distributor onboarding.

Before first shipment, close the loop commercially: confirm the importer of record matches the ETA applicant arrangement, brief the logistics partner that consignments contain licence-exempt wireless medical equipment with certificates attached, and place ETA numbers into the product’s technical file. Post-market, treat any RF-affecting design change — antenna revision, power table update, added Bluetooth feature — as a trigger in the change-control system for ETA reassessment, exactly as it triggers clinical evaluation review. Radio compliance handled this way costs days; handled reactively at a port, it costs launches.

Frequently Asked Questions

Is the MICS band licence-free in India?

Yes — 402–405 MHz is de-licensed under GSR 673 (E) at 25 µW e.r.p with ≤300 kHz emission bandwidth and built-in antenna. Device models still require ETA.

Does the implant itself need approval, or only the external programmer?

Both are radio transmitters. ETA planning should cover every transmitting model in the system, including the implantable unit.

Our device uses BLE, not MICS. Does it still need WPC ETA?

Yes. BLE operates in 2400–2483.5 MHz, de-licensed under GSR 45 (E); the model requires ETA via self-declaration.

Can a foreign medical device manufacturer apply without an Indian office?

Yes, through an Authorised Indian Representative or the Indian importer. PCN India Global provides AIR services.

How long does ETA take relative to CDSCO registration?

ETA-SD is fast — days once test reports exist. Run it in parallel with the CDSCO pathway so radio approval never delays launch.

Do software updates to the implant trigger new ETA?

Only changes affecting RF characteristics (frequency, power, bandwidth, duty cycle) require reassessment.

Why Choose PCN India Global

• Medical-band expertise — precise mapping of implant, body-worn, and external units to GSR 673 (E) and GSR 1047 (E) conditions
• Lab coordination — RF test plans referencing EN 302 537 / EN 301 559 / EN 302 510 methodologies aligned to Indian parameters
• End-to-end ETA-SD filing — Saral Sanchar registration through certificate download for every model in the system
• AIR services — Authorised Indian Representative support for global medical device manufacturers
• Parallel-track planning — WPC ETA coordinated with CDSCO, BIS, EPR, and LMPC so no approval blocks another
• Customs support — undertakings and query resolution for time- and temperature-sensitive medical consignments

Stepping back, the direction of travel in medical technology makes radio compliance steadily more central, not less. Remote patient monitoring is moving from pilot programmes into standard care pathways, implant platforms are gaining wireless features with every generation, and hospital equipment fleets are converging on wireless-first architectures. Each of these trends multiplies the number of transmitting medical models entering India — and with them, the number of ETA filings a manufacturer’s regulatory team must manage alongside its clinical submissions. Companies that build the WPC track into their standard regulatory operating procedure now, with template files, standing laboratory relationships, and an established AIR arrangement, will scale into this wireless future smoothly. Those that continue to treat radio approval as an afterthought will find that the smallest certificate in the file is the one that most often stops a shipment at the port.

PCN India Global manages end-to-end WPC ETA approval for wireless medical devices — from MICS programmers to BLE wearables — through certificate grant and import clearance. Contact us: WhatsApp +91 92895 87478 or email bdm@pcnindiaglobal.com.