D'Addario Humiditrak - Bluetooth Humidity and Temperature Sensor<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Uses a Bluetooth sensor to monitor humidity， temperature &amp; impact </span></li><li><span class="a-list-item"> View status of all your instruments on one easy-to-read display </span></li><li><span class="a-list-item"> Receive push notifications of hazardous conditions </span></li><li><span class="a-list-item"> Free App available in the iTunes App Store and Google Play </span></li><li><span class="a-list-item"> CR2032 battery included. Maximum battery life of 2 years. </span></li><li><span class="a-list-item"> Currently limited to 7 sensor connections at one time </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/31KBAt560FL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31d8IgAtMoL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51zNxNQENmL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51EwtPj92aL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51Fx6PB4vAL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/411-AX6G9DL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/01vsw%2B48W7S.png" noproxy>