Multi Signaling Unit, Signaling Device, Alarm Current 30mA, Peak Output (dBA) 85, Depth (In.) 1 5/8 in, Height (In.) 5 3/8 in, Length (In.) 4 7/8 in, Ambient Temp. Limits (F) 14 to 140, Number Required 1, Standby State (mA) 3.0, Voltage 20 to 29V DC, Standards FM, UL, For Use With D4120W, D4P120, D4S, Mfr. No. D4120