Fuers 2PCS D1 Wireless Security Door Window Alarm Sensor for Home Office Shop 110DB<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="aok-hidden" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li><li><span class="a-list-item"> Built-in loud speaker up to 110db scare the intruder </span></li><li><span class="a-list-item"> Door detector is triggered，it will sound immediately，press set button to turn off and change warning tones (two for you to set) </span></li><li><span class="a-list-item"> Comes with double sided tape for clean easy install and removal，the height of installation about 6-8 feet </span></li><li><span class="a-list-item"> Powered battery，3 X LR44 batteries are included，normally can last 3~6 months </span></li><li><span class="a-list-item"> Wireless DIY standalone door/window alarm sensor for home office apartment pool hotel safety，affordable home security </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/412lOdDT0vL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51OyWS52kSL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41W1My24MCL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/411HTfCfa%2BL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51Cm%2BkzrPGL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51Ct8u8oNJL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/516V4GUm4QL.jpg" noproxy>