Everspring EVS-HSM02-US

30mA, 23.6g, White Featuring elegant styling, a miniature size (31 x 70 x 11.5mm) and over 3 years of service from a single battery, this Everspring Door / Window contact detector installs easily and blends in with any decor. The Door / Window Sensor consists of two parts, one containing a magnet and the other a sensor system that’s activated when the magnet is nearby. When connected to your Vera Controller, the sensor allows you to know when a door or window is in the open or closed position. (Battery life is based on up to 10 trigger events per day. See Technical Specs on web site for more details.)