This standard-model, durable, sealed sound unit features stainless steel outside and diaphragm. Meets ABYC specification A-23 for boats up to 12 meters (39'). Pre-wired and designed to fit existing hold patterns. Max. amp draw: 3 amps. 112 dB rating. 3"L x 3-1/4"W x 1-3/4"H. Stainless steel outside and diaphragm | Standard Mini Compact Signal