HM655 Professional DMR Mobile Two-way Radio

Mobile | DMR

This new generation entry-level professional DMR mobile two-way radio is designed to provide reliable voice and data communication in both vehicles and desktop installations. It is compact and lightweight making it easy to install, with a convenient speaker microphone with a display. The radio is born to be your best partner in transportation, utilities and more.

Highlights of HM655

RELIABLE COMMUNICATION

Thanks to the high RX sensitivity, the HM655 can deliver clear and dependable communication even in areas where the signal is weak or unstable.

WIRELESS CONNECTION

With the built in BT 5.0 module*, the HM655 can work with the BT audio accessories to boost your safety and productivity during in-vehicle communication.*Please be advised that this feature is applicable to the BT HM655 version only

HANDHELD CONTROL HEAD

The HM655 has a convenient Speaker microphone that has a display and controls which can be mounted in close proximity and allow you to turn on or off the radio, switch channels or contacts, adjust the volume.

SUPERIOR DURABILITY

The HM655 withstands harsh temperatures, shock, vibration and meets the MIL-STD-810G standards. The device also features an IP54 rating against dust and water intrusion. The connection between the palm microphone and the 10-pin aviation connector is very secure preventing it from becoming loose. The palm microphone cord has excellent stretching ability to protect it thus giving the maximum service life.

Specifications of HM655

General data
Receiver
Transmitter
Environmental Specs

General data
Frequency Range	V1: 136-174MHz U1: 400-470MHz
Channel Capacity	512
Zone Capacity	32 (32 channels per zone)
Channel Spacing	Analogue: 25/20/12.5kHz Digital: 12.5kHz
Operating Voltage	13.6V±15% DC
Current Drain(Standby)	<0.5A
Current Drain(transmit)	<2.0A
Current Drain(receive)	5W: <4A 25W:<8A; 45W:<12A
Frequency Stability	±0.5ppm
Antenna Impedance	50Ω
Dimensions(H×W×D) mm	42 x 154 x 164 mm
Weight	1100g
BT	BT 5.0 BLE+EDR (hardware option)

Receiver
Sensitivity(Analog)	0.16 μV(Typical)(12 dB SINAD); 0.18 μV(12 dB SINAD)
Sensitivity(Digital)	0.18μV/BER5%
Adjacent Channel Selectivity	TIA-603: 65dB@12.5kHz / 75dB@20/25kHz ETSI: 60dB@12.5kHz / 70dB@20/25kHz
Intermodulation	TIA-603: 75dB@12.5/20/25kHz ETSI: 70dB@12.5/20/25kHz
Spurious Response Rejection	TIA-603: 75dB@12.5/20/25kHz ETSI: 70dB@12.5/20/25kHz
S/N	40dB@12.5KHz 43dB@20KHz 45dB@25KHz
Blocking	TIA-603: 90dB ;ETSI: 84dB
Hum&Noise	40 dB@12.5 kHz; 43 dB@20 kHz; 45 dB@25 kHz
Rated Audio Power Output	Internal Speaker: 3W External Speaker: 6W @ 8Ω
Max. Audio Power Output(Internal)	8 W
Max. Audio Power Output(External)	20 W @8Ω load
Rated Audio Distortion	≤3%
Audio Response	+1～-3 dB
Conducted Spurious Emission	<-57 dBm

Transmitter
RF Power Output	Low power: UHF 1-25W, VHF 5-25 W High power: UHF 1-45 W, VHF 5-50W
FM Modulation	11K0F3E@12.5 kHz 14K0F3E@20 kHz 16K0F3E@25 kHz
4FSK Digital Modulation	12.5 kHz Data Only:7K60FXD 12.5 kHz Data&Voice:7K60FXW
Conducted/Radiated Emission	-30 dBm＞1 GHz; -36 dBm＜1 GHz
Modulation Limiting	±2.5 kHz@12.5 kHz ±4.0 kHz@20 kHz ±5.0 kHz@25 kHz
FM Hum&Noise	40 dB@12.5 kHz; 43 dB@20 kHz; 45 dB@25 kHz
Adjacent Channel Power	60 dB@12.5 kHz; 70 dB@20/25 kHz
Audio Distortion	≤3%
Digital Vocoder Type	AMBE+2™
Digital Protocol	ETSI-TS102 361-1,-2,-3

Environmental Specs
Operating Temperature	-30℃ to +60℃
Storage Temperature	-40℃ to +85℃
ESD	IEC 61000-4-2（level 4) ±15 kV (Air) ±8 kV (Contact）
Dust & Water Protection	IP54
Humidity	MIL-STD-810H
Vibration,Drop&Shock	MIL-STD-810H


Horizontal Position Accuracy	<5 m
Cold Start (Time to First Fix)	<1 minute
Hot Start (Time to First Fix)	<10 seconds
Note	Accuracy specs are for long-term tracking (95th percentile values>5 satellites visible at a nominal -130 dBm);GPS, BeiDou

* Product images, specifications, features, and accessories shown on this page are subject to change due to ongoing technology upgrades and production improvements. To ensure you receive the correct product and compatible accessories, please contact the Hytera sales team for the latest information before placing an order. Hytera reserves the right to modify product details without prior notice.