Transmission frequency:433MHz

Suitable for outdoor use

Built in-backup battery

Built-in Antenn

Cansendout 110db(+3db or -3db)

audio alarm and flash built-in LED when the system alarms

Operating power:110-240V

Dimensions:11.2(W)x20.1(L)x7(H)cm

Comply with GB12663-200

1 x Wireless External Outdoor Flash Siren

1 x Launcher

1 x Power Adaper as your country