Alarm Siren Voice coil Lmpedance 6/8/12 Ohm Voice Coil Dimension(Dia)Ø25.6mm Rated Voltage 12VDC Operating Voltage 9 16VDC Output Power 15W/20W/25W/30W Min.S.P.L 105/108/112/115dB(at Rated Voltage at 1m) Max. Rated Current 550/1000/1200mA Tone Nature Warble/1-Tone /3-Tone/6-Tone Wire Reddish black in 45cm Operating Temperature-20 +60°C Weight 427±10g Our new product, nice design and high quality Welcome to inquire ADX CO., LTD reserves the right to make changes in any specification, data or material contained herein