Audio Visual Electronic Signalling Device (Single Tone), Operating Voltage - 110 Volt. Dc, Det Ails Specification As Follows : 1) Sound Output-45 Db Max. 2) 72X72Mm Front Panel, 68X68Mm Cutout. 3) Tw O Nos. Light Emitting Diode (Red Colour) Fitted In Parallel Path Circuit, Size-5 Mm Dia, 4700 Mcd, 3V. 4) 06 Nos. Suitable Round Head Fixation Screw. [ Warranty Period: 30 Months After The Date Of Delivery ] ]