The 1002WEP EXPLOSION PROOF POWER ALARM siren is a rain tight solid state audible alarm, that features a choice of 9 field selectable tones plus remote control selection of 4 tones with priority. All models of 1002WEP alarms are o-ring gasketed and are UL listed for Class I, Group C & D locations, NEMA Type 4x, and marine outside (salt water) use.