This Honeywell doorbell has illuminated halo and LED strobe alerts, high-quality sound and comes with 6 tunes. It is portable or can be wall mounted with the included hardware. Connect up to 4 transmitters simultaneously, such as push buttons and awareness devices. This doorbell has adjustable volume, sleep mode and mute options. It has a 350' (107 m) range, a battery life of up to 2 years and a Honeywell ActivLink robust signal. The doorbell requires 3 AA alkaline batteries (not included). The push button is weather resistant and illuminated, has wireless "E" push-button compatibility and has an included battery (CR2032). 1-year limited warranty.