Siren: SC-511 Application:The siren / horn is used or match with the car alarm system or home security alarm system, it can make the safety for your car and home. Electronic Characters: SC-511-320 (one tone) 320mA 105±3dB 15W SC511-600 (one tone) 600mA 108±3dB 15W SC-511-600S (six tone) 600 mA 108±3dB 15 W SC-511-1000 (one tone) 1000mA 108±3dB 20W SC-511-1200S (six tone) 1200mA 112±3dB 20W Packing carton size (mm): 570*270*245 N. G: 18.5kg/carton G.W: 19.5 kg/carton