Standard Horizon 10W Amplified External Speaker - Black [MLS-410PA-B] Brand_Lopolight there’s also a dedicated SOS

there’s also a dedicated SOS key

Mounts in a common 1-1/8 in hole

5W on red or blue (less than 0

Voltage - Input Range (Volts): 12/24/32v

Gauge Cut-out Size - 2"

Standard Horizon 10W Amplified External Speaker - Black [MLS-410PA-B] Brand_Lopolight there’s also a dedicated SOS10W Amplified External Speaker Black Redesigned for clear, crisp, and audible reception, the Standard Horizon MLS 410PA is setting the bar on external speakers. With 10 Watts of amplification built in, this compact high performance communications speaker matches the impedance and output requirements of most Standard Horizon transceivers. Compatible With: Standard Horizon VLH 3000A and older models, GX2000 2150 2200 1700 1600 Features: Flush or bracket