QOLSYS IQ DW MINI S-LINE Encrypted Door/Window Sensor QS1135-840 Encrypted S-Line sensor technology protects signals sent to the IQ Panel while still providing support for legacy 319.5 systems. Can be easily mounted on doors or windows with included adhesive. Alerts IQ Panel if moved more than 1 Can be programmed as Safety Sensor for medicine cabinets, chemical storage, safes or storage closets. Using Alarm.com you can get a text if your door or window is left open Create automation rules like turn on light when door is opened or adjust thermostat if window left open. Requires two (2) 3V CR2032 Batteries The built-in tamper switch triggers an alert if the cover is removed. Create custom names for each sensor, determine unique chime type, choose voice prompts on or off.