Reliable Wireless Range - Honeywell Home ActivLink tech provides a dependable cordless doorbells connection up to 200m. Link two doorbells together seamlessly to boost the range up to 400m. Adjustable Volume & Mute - Control chime volume to your preference with an extensive selection of 11 melodies. Sleep/Mute mode silences your battery doorbell for 3, 6, 9 or 12 hours for disturbance-free periods. Visual Alerts - The innovative Halo Light and LED Strobe offer discreet but effective visual alerts to complement your door bell chime in loud environments or when the volume is low and can’t be heard. Easy Installation: Our horizontal compact doorbell is quick and simple to set up without professional help. The package includes a wired doorbell, push button, quick start guide, safety & guarantee information. Requires 4 X LR14(C) 1.5V batteries (not Included). Reliable & Quality - Honeywell Home ActivLink uses the 868MHz frequency to deliver greater range, up to 5-year battery life, and improved connection reliability, all backed by a 2-year quality guarantee., Weight: 0.330693393 pounds, Manufacturer: Honeywell