AVANTEK DT42 Wireless Doorbell Kit with 36 Melodies, 1000ft Working Range Wireless doorbell kit, install battery-operated transmitter outside using adhesive mounting tape or screws, receiver chime units plugs into any standard outlet; maximum effective range 1000 ft (300 m) Use as a residential or business doorbell, or home paging device; select from 36 tunes, from the standard ding dong to any several well-known and fun melodies; volume adjusts to 3 settings including a silent mode Smart design and simple controls are designed for easy installation and operation; mounting the transmitter takes only a minute, this wireless door bell is ready to go out of the box Quality design and materials for sturdy, dependable performance; available in black or white color Includes transmitter, receiver, battery, adhesive mounting tape, and instruction manual; 1-year worry-free product warranty