Chime， JETech Portable Wireless DoorBell Chime Plug-in Push Button (Black) - 2127<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>12V 23A ALK battery for the push button remote is INCLUDED. Wireless doorbell operating at 600~750 feet in open air</li><li>Over 50 different chimes. 4 levels of adjustable ringing volume from 30~110 dB</li><li>No batteries required for the receiver. Simply plug it into a power supply (US Standard)</li><li>Each receiver works with up to 10 transmitters for added security and convenience</li><li>Screws and double-sided adhesive tapes included for easy installation of the transmitter</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41a2t5eJyOL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41FS7FTXiBL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41JwEyKxP8L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/417BK7gKJUL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31QvynxylfL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/4138RATPxvL.jpg" noproxy>