Features Operating voltage: 12VDC starting current: 0.85A operating current: 0.27A diskette size: 105mm × 30mm × 3mm Dimensions: 210mm × 38mm × 39mm Weight: 720g Scope: with building intercom, access control systems supporting the use of suitable door type: wooden doors, metal doors, glass doors, fire doors Product features: 1, with lights, with door sensor signal feedback function, to adapt the voltage range (9 ~ 15VDC) 2, no noise power locks, matte panel adjustable delay , the start time: 0,3,6,9 seconds 3, monitor contact output (NO / NC), 15 seconds after the door locked automatically cut off the sensing point