This lightweight alarm comes in a heavy-duty black plastic housing. It has a beep rate of approximately 60 per minute. It is a compact, rear-facing speaker which prevents damage from power washing. It comes with attached wire leads. The back up alarm is 97 dB and measures 4 3/16 length x 4 3/16 width x 3 1/16 height x 2 inches diameter. It has two hole mounting. Its voltage is 12 to 36 VDC with a current drawn of 0.3 amps. It includes broadband sound warning.