zinc alloy digital lock

Item: digital lock Size: Lock panel---W64*D15*H132 mm Lock cylinder---W221.5*D25*H112mm Operate type: Enter code Main parts: Lock panel and lock body, handle door catch.[ External power supply(Emergency power supply used to supply power to lock when battery have no power), this parts would be send by free as from 1% to 3%] Power supply:4 pcs 7# Battery Function and features: 1.Enter code and turn handle to open door, no need card or key. 2.Have two versions: Master code version or Jump code version 3.Two grade manage--- Master code, and User code. 4.Low power alarm: When battery have not enough power, lock will have a indication. 5.Emergency open: When battery have not power, and can't open lock, at this time can use a external power supply to insert into a socket of lock to supply power to open lock.