Sound range up to 350' (107 m), 84 dB. Plug-in, can also be used as a night light.Illuminated halo and LED strobe alerts, 7 custom halo alert colors. Assignable halo and strobe alerts per push button and accessories. Adjustable colume, sleep mode and mute to adapt use for the time of the day. Mute timer 3, 6, 9 12 hours and permanent mute. High quality sound. Connect up 4 transmitters simultaneously, sush as push buttons and awareness devices (door contacts, motion sensors). ActiveLink robust signal. 1 year warranty.