STARPOINT Extra Add-On Remote Transmitter Button for the STARPOINT Expandable Wireless Multi-Unit Long Range Doorbell Chime Alert System， Model LT， White<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>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. Weatherproof transmitter button</li><li>Includes 1 extra remote transmitter button， double sided sticker， anchors and screws， A23 battery is included.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/415-bqri68L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41WNZkZwxmL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31Kr%2BW%2BFxKL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31QVnwamwTL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31EPMeQq-8L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41oTA8XN9EL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/01%2BtuNIm3pS.png" noproxy>