This EPIRB has quietly built a reputation in the commercial fishing industry as a proprietary electronics package that delivers fast, stable transmissions. In an emergency, your registered, digitally-coded distress message is broadcast via a powerful 6-watt, 406 MHz signal typically within one hour. Bright LED strobe conserves battery power without sacrificing intensity. Exclusive polycarbonate blend construction resists UV rays and chemicals and includes recessed lanyard for tangle-free deployment. Waterproof down to 33'. Automatic category I bracket is fully enclosed and made from high-density polyethylene. 15.3" x 4.2" x 3.58".