STARPOINT Expandable Wireless Multi-Unit Long Range Doorbell Chime Alert System， Base Starter Kit includes 2 Plugin Receivers &amp; 2 Remote Button Transmitter， Model LCBase， White<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>2016 STARPOINT MODEL – UPGRADED doorbell chimes &amp; ringtones. NOTE: THIS PRODUCT PART IS ONLY COMPATIBLE AND PAIR-ABLE WITH OTHER STARPOINT PARTS – LOOK FOR THE STAR SYMBOL FOR COMPATIBILITY.</li><li>The STARPOINT L Series is a CONFIGURABLE and EXPANDABLE doorbell system that can EASILY ADD on 20+ more extra receivers， transmitter buttons， motion sensors and door sensors. Custom build your own system that fits for your needs. Easy to use pair-able random generated frequency code technology allows you to mix and match L Series components easily with one or multiple receivers.</li><li>Multiple receivers can be configured to RING WITH DIFFERENT chimes/ringtones to let you know which transmitter was triggered –- a very convenient feature for multiple doorway entries.</li><li>Built in receiver MEMORY feature RETAINS doorbell chime/ringtone selection even when receiver is unplugged or powered off. Long range operation with the receiver at over 500 feet</li><li>Base start kit includes 2 plugin receivers and 2 remote transmitter buttons， double sided stickers， anchors， screws， A23 battery is included.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/410CLaSAagL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41WNZkZwxmL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/415n6fhynvL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41oGMbywQTL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41kq%2BGtZgVL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31CiOyNMOuL.jpg" noproxy>