2GIG Outdoor Wireless Contact Sensor (2GIG-DW30-345)Sends a notification to the alarm panel when a door, gate or window is opened or closed. Enables two unique zones. One is for an internal magnetic reed switch while the second is for a normally closed circuit that can have external devices wired to it. Can be painted to match its mounting surface. Sensor Dimensions: 4. 6 x 2. 1 x 1. 5 inch Magnet Dimensions: 4. 1 x 1. 0 x 1. 1 inch Battery life: Up to 5 years Wireless Signal Range: 350 ft (106. 7m),