Rokonet Risco IrexPlus Request to Exit PIR Motion Sensor with Internal Buzzer and Relay Timer (White) Digital PIR motion detection, Wall or ceiling mount up to 4.6m (15'), Selectable Fail Safe mode or Fail Secure mode, Adjustable relay latch time Single or double door use: Two "Form C" Relays, selectable NC or NO, LED for walk-test, Operates with 12 to 30V AC or DC power Door Secure Mode prevents unwanted persons from entering following a valid exit, Internal buzzer - 85dB with adjustable volume and direct external activation, Door Alarm Mode activates the buzzer if the door is forced open or left open too long Remote input for Parallel Door Control - the door lock opens either upon iREX motion detection OR from an external device, Door Alarm Mode activates the buzzer if the door is forced open or left open too long IQ LogicTM provides added security, by enabling iREX motion detection only after an external device has been activated (such as a floor switch, additional PIR, or burglar alarm system disarmed)