Standard Horizon SSM-21A Speaker Microphone

The Standard Horizon SSM-21A Commercial Speaker Microphone is designed for clear audio in demanding environments. Compatible with select Yaesu and Standard Horizon handheld radios, including HX-870, HX-370, HX-890, and others. Its heavy-duty, waterproof, and submersible construction ensures reliable performance in commercial and marine applications. Features a threaded single-pin, 4-conductor connector for secure attachment. Ideal for professional radio communication needs.