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HM685 Professional DMR Mobile Two-way Radio

HM685

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. Compact and lightweight, the radio is easy to install. With the ergonomic design, the four piano-style buttons make operations effortless. The AI-based noise cancellation ensures the radio delivers superb clear audio without ambient noise. The radio is born to be your best partner in transportation, business, utilities, and more.

Highlights of HM685

RELIABLE COMMUNICATION

Thanks to the high RX sensitivity, the HM685 can deliver clear and dependable communications even in areas where the signal is unstable or weak.

DIGITAL AND ANALOGUE COMPATIBILITY

The HM685 can operate in either analogue or digital mode, which is the ideal solution for you to migrate from analogue to digital with minimal disruption and investment.

INNOVATIVE DESIGN

Compact and lightweight, the HM685 is easy to install, remove, or operate in the vehicle. The front panel adopts two-shot molding to make the operation more recognizable. The transflective display is readable even in the dark or direct sunlight. At the bottom of the display, the four piano-style keys offer great haptic feedback when pressed.

WIRELESS CONNECTION

With the built-in BT 5.0 module*, the HM685 can work with the BT audio accessories to boost your safety and productivity during in-vehicle communications. And these radios can be programmed through BT, saving time and resource.*Please be advised that this feature is applicable to the BT HM685 version only

CRYSTAL-CLEAR AUDIO

The HM685 delivers superb audio in noisy streets or highways. The AI-based noise cancellation filters out echoes and background noises such as horn and engine sounds, making you hear and be heard in the conversation. The howling suppression prevents the screeching or howling feedback between two radios in the same vehicle, ensuring clear and uninterrupted communication on the move.

SUPERIOR DURABILITY

The HM685 withstands harsh temperatures, shock, and vibration, and meets MIL-STD-810G standards, and IP54 for 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 HM685

  • 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 Analog: 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 159 x 164 mm
Weight 1150g
Display 1.45 inch, 4 Line 320x240 pixels
BT BT5.0 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
Hum&Noise 40 dB@12.5 kHz; 43 dB@20 kHz; 45 dB@25 kHz
Rated Audio Power Output(Internal) 3 W @20Ω load
Rated Audio Power Output(External) 7.5 W @8Ω load
Max. Audio Power Output(Internal) 7.5 W @20Ω 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
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.

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