ETMY ET-C11 4G PoC Radio: 12 Questions Answered on Features, Specs & Use Cases

If you are evaluating a PoC (Push-to-talk over Cellular) radio for your team, the ETMY ET-C11 is one of the most balanced options in the mid-range: a 4G network radio with a 1.44-inch color display, dual-SIM slots, an optional GPS module, and a 3000mAh battery. In this guide, we answer the 12 questions buyers ask most — with honest specs and no marketing fluff. Check the ET-C11 product page for bulk pricing →

Q1: What exactly is the ETMY ET-C11?

The ET-C11 is a 4G PoC network radio — a walkie-talkie that transmits over the cellular network instead of traditional radio frequencies. That means your team can talk group-to-group or one-to-one across a city, a province, or the entire country, with no repeaters, no base stations, and no license fees.

It runs on an RTOS (real-time operating system), boots fast, sips power, and is built around one job: reliable push-to-talk for commercial teams.

Key identity specs:

• Dimensions: 92 × 60 × 33 mm
• Weight: 152 g
• Network: 4G LTE (three regional hardware versions, see Q2)
• Battery: 3000 mAh
• Charging: USB Type-C

Q2: Which networks and frequency bands does it support?

The ET-C11 ships in three regional versions, so confirm the correct variant for your market before ordering:

Why it matters: a PoC radio is only as good as its network match. Buying the SEA version for a European fleet means poor band coverage. When requesting a quote, always specify your operating region.

Q3: What does the 1.44-inch color display show?

The ET-C11 has a 1.44-inch color LED display — a genuine step up from the small monochrome screens on entry-level PoC radios. On it you can see:

• Contact and group lists for quick dialing
• Individual call / group call status
• Signal strength and battery level
• Date and time

For dispatch-heavy teams (hotels, security), having names and groups on screen means fewer mis-dials and faster call setup.

Q4: Why does dual-SIM matter on a walkie-talkie?

The ET-C11 has dual-SIM slots, which is rare at this price point. Two practical benefits:

1. Signal redundancy — insert SIMs from two different carriers. If one network is weak on a job site or a highway route, the radio keeps working on the other.
2. Cost control — assign cheaper data plans per region or per carrier, useful for fleets that cross coverage zones.

For taxi fleets and long-haul operations, dual-SIM is one of those features you don't appreciate until the day one carrier goes down mid-shift.

Q5: What calling modes does it support?

Two core modes, both standard for professional PoC deployment:

• Group Call — push-to-talk to an entire talk group at once (dispatch to all drivers, supervisor to full site crew)
• Individual Call — private one-to-one calls through the contact list

Group work and private instructions no longer need two separate devices or a phone call. Note: the C11 focuses on these two modes; if you need All-Call broadcast, tiered group management, or 20 programmable shortcut keys, look at the ET-C28 or higher-tier models.

Q6: How is the audio quality in noisy environments?

Two specs answer this:

• Audio output power: 2 W — loud enough for cab interiors, machinery areas, and supermarket floors
• Distortion: < 3% — cleaner audio than the ≤5% figure common on budget radios

Combined with the built-in noise reduction, voices stay intelligible at a construction site or in a moving vehicle — which is exactly where most radio conversations actually happen.

Q7: How long does the 3000mAh battery last?

The 3000 mAh battery is 62% larger than the ET-C28's 1850 mAh pack, and the RTOS plus a dedicated power-saving mode keep idle drain low.

Realistic expectation for a full shift: a day of active group calls on a single charge is well within reach, with standby measured in days, not hours. Exact runtime depends on your talk pattern and network conditions — fleet buyers running continuous dispatch should budget a charging rotation, which the Type-C port (see Q8) makes easy.

Honest note: the brochure does not publish an official standby-hour figure, so treat runtime as "full-shift capable" rather than a guaranteed number of hours.

Q8: How do you charge it?

Via USB Type-C (DC 3.6–4.2 V) — the same cable standard as most modern phones and tablets.

Practical upsides for team deployment:

• One cable type for the whole device pool
• Cheap replacement cables, available everywhere
• Charging from power banks, vehicles, or laptops on the go

The standard box includes a charger; see Q10 for the full list.

Q9: Does the ET-C11 have GPS?

GPS is optional (A-GPS supported) — this is an honest "it depends":

• If your fleet needs location tracking and dispatch visibility, order the GPS-equipped configuration; A-GPS shortens time-to-first-fix using network assistance.
• If you only need voice communication, the non-GPS version saves cost.

There is no IP waterproof/dustproof rating published for the C11 — being clear about this up front avoids the wrong tool for the job.

Q10: What comes in the box?

Standard package:

• ET-C11 radio unit
• Battery (3000 mAh)
• Back clip
• Lanyard
• Charger

Everything a single user needs to deploy. Fleet orders typically add spare batteries and a multi-slot charging setup — ask about bulk configurations when requesting a quote.

Q11: Where does the ET-C11 fit best?

The brochure targets four scenarios, and the spec set backs each one:

Positioning within the ETMY lineup: the C11 sits between the entry-level ET-C28 (smaller screen, no dual-SIM, 1850 mAh) and the dedicated waterproof ET-538 (IP68, analog, no 4G required). Choose the C11 when screen, battery, and dual-SIM matter more than deep waterproofing or off-grid operation.

If necessary, please read:

Read: ETMY ET-C28 4G PoC Radio: 12 Questions Answered →
Read: ETMY ET-538 Waterproof Radio Full Guide →

Q12: Full spec sheet — and who should buy it

ETMY ET-C11 — complete specification:

Bottom line: the ET-C11 is the right pick when your team needs a mid-tier 4G PoC radio with a readable color screen, all-day battery, and carrier redundancy — and you don't want to pay for ruggedization you won't use.

Ready to equip your team? Contact ETMY for volume pricing on the ET-C11 →

Download the Spec Sheet

ET-C11 — 4G PoC Radio Spec Sheet (PDF)