Using the best materials for a marine environment, this speaker system will withstand even the harshest UV rays and salt spray. Watertight plastic housing and aluminum mounting bracket ensure speakers remain durable. Microphone/control head features two thumb wheels for independent source and mic volume, a push-to-talk switch, and a 3-position power switch. Main amp has pigtail leads for speaker output, power, ground, and remote. Mic input includes fixed compression and/or AGC, and bandpass filter. Up to 100 watts RMS per channel. Speakers: 18\”\” W x 11\”\” D x 8-1/2\”\” H.