... compulsoryAuto program:Open signal→Unlock→900 open door→Time delay for opening→Closed→LockedDoor Open degree:AdjustableAuto open speed:2. ... current,over-heat, over-voltage,over low voltage,can ensure security.Multifunction extended interface,such as Door Access control device, ... card,Barcode card,ID card,IC card,Fingerprintetc. Notice for installationThe door should have door frame,if not,should add ...