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.
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.
- 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|
|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|
(Projections not included)
|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)|
・ AC adapter and USB cable*
・ Belt clip, MB-133
・ Hand strap
* Not supplied or may differ, depending on version.
Ingress Protection (IP) Code
Ingress Protection (IP) ratings define the level of protection provided by enclosures to prevent the ingress of foreign objects (dust) and liquid into the electrical equipment.
International Standard IEC 60529 outlines an international classification system that describes the sealing characteristics of electrical equipment.
The classification system uses the “IP” code, or “Ingress Protection” code, to define the level of seal.
An IP number contains two numbers (i.e. IP67) in most instances which relate to the level of protection provided by an enclosure or housing.
Either number may be shown as “X” (i.e. IPX6 / IP7X) to indicate the “X” part is not tested.
Degrees of Solid Particle Protection – 1st Digit
|IP6x||No ingress of dust; complete protection against contact. (Dust tight)|
|IP5x||Protected from the amount of dust that would interfere with normal operation. (Dust protected)|
Degrees of Liquid Ingress Protection – 2nd Digit
|IPx8||Protected against continuous immersion in water.
Depth and duration specified by model.
|IPx7||Protected against temporary immersion in water for 1 m (3.3 ft) for 30 minutes|
|IPx6||Protected against water projected by powerful jets from any direction.
100 L per minute by a powerful jets (12.5 mm) for 3 minutes.
|IPx5||Protected against water projected by jets from any direction.
12.5 L per minute by a nozzle (6.3 mm) for 3 minutes.
|IPx4||Protected against water splashed against the equipment from any direction|