Flexzion Wireless Door Bell Kit Portable Doorbell 1 Remote Push Botton 1 Plugin Digital Receiver Battery Operated 80M/200FT Working Range Adjustable Volume Control Doorbell kit of 1 push button (transmitter) and 1 door chimes (receivers) supports a wireless range of up to 200 ft / 80 m Push button can be fixed to the doorframe with the screwS, or attached to the wall using double-sided adhesive tapes Adjustable volume control to high, medium and low settings Built in anti-interference design; Weather resistant push buttons Easy to install, no wiring required