The Icom HM157SW-12 is a remote speaker microphone (COMMANDMIC™) that enables secondary station control of compatible Icom marine VHF radios from remote locations up to 70 feet from the main unit. This Super White remote accessory combines a built-in speaker, large LCD display, and multifunction jog dial to deliver intuitive command access from flybridge, cabin, or other secondary stations without relocating to the primary radio installation.
## Technical Specifications
• **Model:** HM157SW-12
• **Type:** Remote Speaker Microphone (COMMANDMIC™)
• **Color:** Super White
• **Operating Temperature Range:** −20°C to +60°C (−4°F to 140°F)
• **Waterproof Rating:** IPX7 (temporary immersion protection up to 1 m for 30 minutes)
• **Cable Length:** 450 mm (17.7 inches, curled)
• **Audio Output Power:** 0.4 W typical @ 10% distortion with 4 Ω load
## Key Features
• Built-in speaker for direct audio output
• Large LCD display for enhanced readability
• Multifunction jog dial for channel selection, volume, squelch, menu settings, DSC calls, and foghorn control
• 11-button housing for comprehensive radio function management
• Intercom functionality between COMMANDMIC™ and main radio unit
• Flash mount connection point for installation
## Typical Applications
Secondary station control in marine environments where operator presence at the main radio unit is impractical. Enables bridge watch operations, cabin-based monitoring, and multi-station coordination aboard vessels equipped with compatible Icom VHF installations.
## Compatibility & Integration
The HM157SW-12 operates with Icom marine VHF models: IC-M421, IC-M422, IC-M504, IC-M504A, IC-M505, IC-M602, IC-M603, IC-M604, and IC-M604A. Waterproof rating matches the connected radio unit’s protection level.
