and high quality; Master Card/keychain have been set for the lock, no need to be programmed or activated;All you need to do is to install 2 pieces AA alkline batteries, you can use the lock.This is suitable for wooden door only, for drawer, locker, cabinet, slidding door;No need to drill holes, No damage to your cabinet;Auto-rebounce and auto-lock function, easy to operate.It is compatible with IC 13.56KHZ CHIP CARDS.Stainless steel latch and ABS plastic lock body, durable and anticorrosion.Motor life span is about 100,000 , The Static Power Consumption less than 5A;One master card can be set to open several locks. so you only have to keep one key to control all locks.Specification:Types: 3 KeychainsPower supply: 4 pcs AA alkaline batteries ( not include )Battery life span: more than 15 monthsOperating temperature: -30 degree~80 degreeAntistatic behavior: more than 15,000V, information can be saved though in strong static Consumption: about 200mALow voltage alarm: 4.8VAccept cabinet or wardorbe door thickness: within 50mmcolour: blackMaterial: stainless steel + ABSsize: 11.5x8x5.5cm/4.53x3.15x2.17inchPackage Contents: 1 x Lock Mortise (body)1 x Door holder (Side catch)3 x cards1 x External power supply1 x Installation screw bag(6 pcs)Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.