BD5i Series

Handheld | DMR


diagram indicating highlights of BD5i Series


Enhance signal receiving ability.

Speaker and Microphone

Provide clear receive and transmit audio.

Channel Selector

Supports 16 channels to be changed very easily.

IP54 Rated

Push-to-talk Button

Programmable Button

Long Life Battery

Power and Volume

OLED Display

Built-In Bluetooth

Micro USB Port


Created with Sketch. RUGGED AND RELIABLE

BD502i/BD552i is designed and tested to meet Military Standards 810 C, D, E, F and G, including temperature shock, vibration, high & low temperature and humidity. IP54 dust- and water-proof design guarantees the reliability in different environments. And based on TDMA technology, the radio can work longer, up to 22 hours in digital mode.

Created with Sketch. CLEAR VOICE

With digital encoding and correction technology, human voice is transmitted much clearer without background noise, even from great distances.This is the next generation audio quality experience.


Detects the signal type and automatically switches between analog and digital mode. Enables simple and cost-effective migration path to digital.


Voice announcement of channel number for quick and accurate channel switching, even in low visibility (BD502i only)

Created with Sketch. ANALOG & DIGITAL DUAL MODES

BD502i/BD552i can support both analog and digital modes on the same hardware. You can easily switch between two operation modes and it helps you to communicate with analog radios.

Created with Sketch. LONG WORKING TIME

Based on TDMA technology, BD502i in digital mode can work as long as 16 hours @ 1500mAh or 22 hours @2000mAh in 5-5-90 mode.

Created with Sketch. BUILT-IN BLUETOOTH

Built-in Bluetooth enables connectivity to earpieces and other wireless accessories (BD552i-BT models only)

Created with Sketch. OLED DISPLAY

High contrast display for Channel number, Caller ID, Zone number, battery power, and high/low power (BD552i only).

BD50 X 170323 164928

Created with Sketch. ANTI-INTERFERENCE

Digital encoding and error correcting reduces signal interference on the same frequency.

Created with Sketch. DMR

DMR signaling enables group call, private call, and all call transmitting with PTT ID. Supports DMR Tier II repeaters to extend coverage.

Created with Sketch. PSEUDO TRUNKING

This virtual trunking feature automatically uses whichever digital timeslot is free to improve call connectivity and frequency efficiency.

Created with Sketch. VOX

Voice activated microphone enables hands free operation. Also supported on external earpiece and microphone accessories.

Icon 24px Created with Sketch. SCANNING

Allows listening to communication activities on other channels

Accessories for BD5i Series

Included as standard with BD5i Series Included as standard with BD5i Series

Technical Specifications

General data

Frequency range
UHF: 400-470 MHz VHF: 146-174 MHz
Channel capacity
Zone capacity
Channel spacing
Operating voltage
3.7 V
1500Ah (Li-Ion) 2000Ah (Li-Ion)
Battery service life (5/5/90)
Analog: 12/16 hours (1500mAh) Digital:16/22 hours (2000mAh)
Frequency stability
±0.5 ppm
Antenna impedance
50 Ω
Dimensions (H×W×D)
4.25" x 2.12" x 1.14", 108×54×29mm
8 oz. (with AN0435W09 and BL1506)
BD502i has no display, BD552i has single line display


RF Power Output
VHF High power: 5W VHF Low power: 1W UHF High power: 4W UHF Low power: 1W
FM Modulation
11K0F3E @ 12.5KHz 16K0F3E @ 25KHz
4FSK Digital Modulation (Digital Emissions Designator)
12.5 kHz (data only): 7K60FXD 12.5 kHz (voice & data): 7K60FXW
Conducted/Radiated Emission
-36 dBm < 1 GHz -30 dBm > 1 GHz
Modulation limiting
±2.5 kHz at 12.5 kHz ±5.0 kHz at 25 kHz
FM Hum & Noise
40 dB at 12.5 kHz 45 dB at 25 kHz
Adjacent channel selectivity
60 dB at 12.5 kHz 70 dB at 25 kHz
Audio Response
+1 ~ -3dB
Audio Distortion
≤ 3%
Digital vocoder type


Sensitivity (Digital)
0.22μV / BER 5%
Sensitivity (digital)
0.22μV (Typical) (12dB SIN AD) 0.4μV (20dB SIN AD)
Adjacent channel selectivityTIA-603
60dB @ 12.5KHz/70dB @ 25KHz
65dB @ 12.5/25KHz
Spurious response rejectionTIA-603
70dB @ 12.5/25KHz
Hum & Noise
40dB @ 12.5KHz 45dB @ 25KHz
Rated Audio Power Output
Rated Audio Distortion
Audio Response
+1 ~ -3dB
Conducted spurious emission
< -57 dBm

Environmental Specs

Operating temperature
-30 °C to +60 °C
Storage temperature
-40 °C to +85 °C
IEC 61000-4-2 (level 4) ±8 kV (contact ) ±15 kV (air)
Dustproof & Waterproof
IP54 Standard
Per MIL-STD-810 C/D/E/F/G Standard
Shock & Vibration
Per MIL-STD-810 C/D/E/F/G Standard