Wireless Doorbell, AVANTEK Mini Waterproof Door Bell Chime Operating at 1000 Feet

SIMPLE SETUP: Just plug the mini receiver into a socket and fix the transmitter on a wall with the accessories provided; includes 2 screws, 2 anchors, a key and a piece of double-sided bonding tape
300 M/1000 FT ULTRA LONG WIRELESS RANGE: 1 plug-in receiver included; will not interfere with other equipment in your home or those of your neighbors; ensures you will never miss a visitor, even if you are a few rooms away or on another floor