Motorola RMM2050 Two Way 5 Channel MURS VHF Radio

The RMM2050 is the RM Series radio that needs no FCC license. Motorola labels it MURS, FCC License Free, and it runs the five MURS frequencies its spec sheet lists: 154.57 MHz and 154.60 MHz at 20.0 kHz, and 151.82, 151.88 and 151.94 MHz at 11.25 kHz. Channels are selected through its two programmable buttons.

That licensing difference is the reason to choose it. The UHF and VHF models in this series operate on business-exclusive frequencies that require a license, which is the correct answer for a site that wants clear air of its own. A small operation that wants radios working the day they arrive, with no filing and no renewal, buys MURS instead and accepts that the five channels are shared with anyone else nearby using them.

Beyond the frequencies it is the same radio as the rest of the family. 2 watts on high power and 1 watt on low, 1500 mW of audio, up to 250,000 square feet or 20 floors of coverage subject to terrain and conditions, and up to 15 hours per charge at a 5/5/90 duty cycle with battery save on.

It weighs 8.6 oz (244 g) with the standard Li-Ion battery in the 4.5 by 2.2 by 1.6 in RM Series case, sealed to IP55 and tested to Military Standard 810 C through G across a -30 C to +60 C operating range. The antimicrobial coating on the housing carries Motorola's own caveat that it does not protect users against bacteria, viruses or other disease organisms.

Supplied with a Li-Ion battery, a carry holster with swivel belt clip, a drop-in charging tray with power supply and the user guide.

Who it is for

The RMM2050 is the RM series radio for a small business that wants rugged radios working the day they arrive, with no FCC licence: it runs on the five MURS frequencies, which are shared with any other MURS user nearby. Everything else is the RM series platform.

Size, weight and battery

• Size: 4.5 x 2.2 x 1.6 in (115.6 x 57.6 x 40.5 mm) with either battery.
• Weight: 8.6 oz (244 g) with the standard Li-Ion battery; 8.7 oz (247 g) with the high-capacity battery.
• Battery life: up to 15 hours with battery save on, or up to 12 hours without, on the standard 2150 mAh Li-Ion battery at a 5/5/90 duty cycle; a 3200 mAh high-capacity battery is available.
• Power and band: 2 W high and 1 W low on the five MURS VHF frequencies (154.57 and 154.60 MHz at 20 kHz; 151.82, 151.88 and 151.94 MHz at 11.25 kHz).
• Audio: 1500 mW.
• Coverage: Motorola quotes up to 250,000 square feet or 20 floors, varying with terrain, conditions and the radio model.
• Protection: IP55, tested to Military Standard 810 C through G and to Motorola's accelerated life test simulating up to 5 years of field use; operating temperature -22 F to 140 F (-30 C to +60 C).

Licence

Motorola labels the RMM2050 MURS, FCC licence free. No FCC business radio licence is needed; the five MURS channels are shared.

Accessories that fit

CMI connector code: MA. Motorola's RM series user guide lists these as authorised accessories: the HKLN4599 earpiece with PTT and microphone, the HKLN4601 surveillance earpiece, the HKLN4604 swivel earpiece, the HKLN4606 remote speaker microphone, the PMNN4434 standard battery and PMNN4453 3200 mAh high-capacity battery, the HKLN4510 swivel holster, the PMLN6394 single-unit charger kit, the PMLN6384 six-unit multi-unit charger, the HKKN4028 cloning cable and the HKKN4027 programming cable. Motorola also states that RDX series audio accessories can be reused on the RM series.

Part number

CMI part number: RMM2050. The rest of the RM series: RMU2040 (four-channel UHF), RMU2080 (eight-channel UHF), RMU2080d (eight-channel UHF with a display), RMV2080 (eight-channel VHF). See CMI's RM series collection, Motorola collection and business radio collection.