Leviton PRR11-T Relay and Wall Switch Auto On/Off 500W 220-240v AC Wall Mount PIR Sensor, Light Almond Pushbutton manual override allows controls to be used like standard ON/OFF switches Detects motion within in a maximum of 707 SF and controls the connected lighting The sensor uses a Fresnel lens to detect heat across zones to trigger the sensor Buzzer alarm: activated automatically when the selected Delayed-OFF time is more than 3 minutes Ambient light hold OFF (10-500 lux)