1, Low temperature, long service life,durable. 2, Delay time 0-9s adjustable 3, OEM Overall Characteristic• The product works with the access controller to control the door. Be fixed on glass doors,wooden doors, iron gate and fireproof doors. • This product is with fail-safe design which operate with DC12V.4 voltage. Easy to set the delay time according to the needs of user, which can avoid the ...