Floating, Lightweight & Smart Features


Lightweight and Compact Body

The IC-M25 is the lightest weight floating marine radio* (218 g; 7.7 oz). Its slim depth (30.5 mm, 1.2 in) can be comfortably operated with one hand. These features make it easier to equip, carry and operate for a long time.
*As of June 2022, researched by Icom.

Float’n Flash™

If you accidentally drop the IC-M25 into the water, it will float, flash and sound an alarm. The buoyancy, the flashing light, and the sound reduce the risk of loss at sea.

11 Hours of Battery Life

The built-in 1570 mAh (typical) Li-ion battery realizes 5 Watts (approx.) output power and 11 hours of operation*. 
* Typical operation with Tx (Hi): Rx: Standby=5:5:90

700 mW Audio Output

The IC-M25 provides a powerful 700 mW (typical) audio output and received voice can be heard loud and clear. 


On the front panel, the function keys are good-sized and simply laid out. The large display features big channel numbers supporting 4-digit channels and automatic backlighting.

USB Charging (Micro-B USB type)

The IC-M25 adopts a micro-B USB charger connector* widely used on mobile devices. The built-in Li-ion battery pack can be charged quickly in three hours (approx.).
*The IC-M25 accepts 5 V/1 A (Max.) input. Use of third-party products is not guaranteed.

Optional Speaker-Microphone, HM-213

The optional waterproof speaker-microphone, HM-213, provides commercial grade convenience while mounting the radio on the waist. The radio floats even when the HM-213 is attached.

Other Features

  • IPX7 waterproof construction 
    (1m depth of water for 30 minutes)
  • 4-step battery life indicator
  • 2-step power save function
  • Weather channel with weather alert 
  • Dual/Tri-watch functions
  • Instant access to Ch 16 or programmable call channel
  • Favorite channel function
  • Monitor function opens noise squelch
  • Auto scan function
  • Display auto backlighting
  • AquaQuake™ prevents audio degradation from a water-logged speaker


Frequency range Tx 156.025–157.425 MHz
Rx 156.050–163.275 MHz
Usable channel groups INT, USA, CAN, WX channels
Type of emission 16K0G3E (FM)
Power supply voltage 3.7 V DC nominal
Current drain Tx 2.3 A
Rx (Internal SP/External SP) 400 mA/200 mA (Max. audio) 
Operating temperature range –20°C to +60°C; –4°F to +140°F
Antenna impedance 50 Ω
Dimensions (W×H×D)
(Projections not included)
56.6×134.2×30.5 mm;
2.2×5.3×1.2 in
Weight (approximately) 218 g; 7.7 oz (With antenna and MB-133)


Output power 5 W (approximate)/1 W
Max. frequency deviation ±5.0 kHz
Frequency stability ±10 ppm
Spurious emissions –68 dBc typical
Adjacent channel power 70 dB
Residual modulation 40 dB


Sensitivity 0.25 μV typical (at 12 dB SINAD)
Squelch sensitivity 0.25 μV typical (at threshold)
Adjacent channel selectivity 70 dB typical
Spurious response 70 dB typical
Intermodulation 70 dB typical
Audio output power
(at 10% distortion)
Internal SP 700 mW typical (8 Ω load)
External SP 300 mW typical (4 Ω load)

Measurements made in accordance with TIA/EIA-603. All stated specifications are subject to change without notice or obligation.

Applicable IP Rating

Ingress Protection Standard
Water IPX7 (Waterproof protection)

Supplied Accessories

・ AC adapter and USB cable*
・ Belt clip, MB-133
・ Antenna
・ Hand strap
* Not supplied or may differ, depending on version.

Catalogs / Brochures

Brochures Name Size
IC-M25 3.71MB
Marine Products 6.48MB

Instruction Manual / Guides

Name Model Name Note
Basic Manual (Spanish) IC-M25
Instruction Manual IC-M25/IC-M25EURO