Icom IC-455 UHF 477 MHz CB Transceiver 12V-24V DC Autosensing



5 Watt RF Output Power

5 Watts (High) and 1 Watt (Low) selectable output power.

Seven-Colour Backlight LCD

The colour of the LCD Screen can be changed to reflect the operating status. Different colours can be assigned to channels, and colours can be set to indicate when scanning or transmitting.

Noise Reduction, Audio Equalizer & Voice Changer

The Noise Reduction reduces background noise from both transmit and receive audio.

Voice Recorder & Instant Play Back

Can record up to 10 messages of 30 seconds each, for a total of 5 minutes.


Supports Both 12 V/24 V DC Power Sources

Accepts a 12/24 V DC power source and it is suitable for most types of cars and trucks.

Dynamic Group Scan for Keeping Group Communication

Using a CTCSS or DTCS tone, this function finds an open channel for group communicaton.

Loud Speaker-Microphone with Auto Volume Control

The microphone monitors ambient noise levels and automatically adjusts the audio level.

IP54 Water Resistance & Dust Protection


Frequency coverage CB 476.425–477.4125 MHz
RX 400.000–520.000 MHz (RX only)
Mode 8K50F3E
Number of channels Max 256 channels/8 banks
Antenna impedance 50 Ω
Input impedance (MIC) 600 Ω
Output impedance (Audio) 4 Ω
Intermediate frequency 1st 49.95 MHz, 2nd 450 kHz
Operating temperature range - 10℃ to +60℃
Power supply voltage 13.8 or 27.6 V DC nominal
(Negative ground)
Current drain with HM-244 27.6 V DC RX stand-by 300 mA (approx.)
RX Maximum audio 1000 mA (approx.)
TX (5 W output) 1500 mA (approx.)
13.8 V DC RX stand-by 500 mA
RX Maximum audio 1500 mA
TX (5 W output) 3000 mA
(projections not included)
Main unit 125 (W) × 29 (H) × 160 (D) mm
HM-244 62.1 (W) × 101.5 (H) × 30.5 (D) mm
Weight (approx.) Main unit 344 g
Main unit with HM-244 535 g


Output power 5W / 1W (selectable)
Modulation system Variable reactance frequency modulation
Max. frequency deviation ±2.5 kHz
Frequency stability ±2.5 ppm
Spurious emissions –30 dBm max. (5 W: 67 dBc)
Adjacent channel power –16 dBm max. (5 W: 53 dBc)
Audio harmonic distortion 1% typical (60% deviation)
Residual modulation 40 dB typical
Limiting characteristic of modulator 70 to 100% of maximum deviation


[CB (476.425–477.4125 MHz)]

Sensitivity (12 dB SINAD): 0.22 μV typical
Squelch sensitivity 0.2 μV typical (Threshold)
Hum and noise 48 dB typical
Intermodulation rejection ratio 72 dB typical
Spurious response rejection ratio 80 dB typical
Adjacent channel selectivity 68 dB typical
Conducted spurious radiation –57 dBm max. (9 kHz–1.0 GHz)
–47 dBm max. (1.0 GHz–4.0 GHz)
Audio output power 5.0 W max. at 10% distortion with 4 Ω load
Audio frequency response +2 dB to −8 dB of 6 dB/octave from 300 Hz to 2550 Hz

[RX (400.000–520.000 MHz)] (Except CB (476.425–477.4125 MHz))

Sensitivity (12 dB SINAD) 0.25 μV typical
Hum and noise: 45 dB typical
Conducted spurious radiation –57 dBm max. (9 kHz–1.0 GHz)
–47 dBm max. (1.0 GHz–4.0 GHz)
Audio frequency response +2 dB to –8 dB of 6 dB/octave from 300 Hz to 2550 Hz

Measurements made in accordance with AS/NZS 4365-2011 (R2016), AS/NZS 4295:2015.
All stated specifications are subject to change without notice or obligation.

Supplied Accessories

  • Speaker-microphone, HM-244
  • DC power cable
  • Mounting bracket for Main unit
  • Microphone hanger
SKU IC-455
Brand Icom