This 5 x 8 inch electronic alarm siren is small and compact. The brackets can pivot up to 90 degrees. It features dual tone, warbling and steady sounds. It has 30 watt RMS with a sensitivity of 120 dB. The cable is concealed in the base. It is encased in weatherproof ABS plastic. It operates on 6-12V DC. It measures 5"(H) x 8"(W) x 9.5"(L).