325 in H X 23 in W X 1 in L Water Alarm ForMfr #: BW WA360 Patented design allows it to detect water on any side Senses as little as " of water Compact size (2" x 1" x 3 ") fits almost anywhere Piercing 110 dB alarm can be heard throughout the house Save money by detecting leaks early, before costly water damage occurs Solid state circuitry is extremely sensitive and reliable Battery saver feature only uses energy when the alarm is sounding Requires a 9 volt alkaline battery (not included)