Features: Master Card/keychain have been set for the lock, no need to be programmed or activated. All you need to do is to install 4 pieces AA alkline batteries, then you can use the lock. This is suitable for wooden door only, widely used special for drawer, locker, cabinet, slidding door. Stand-alone,reset system can be recognized all cards ( Don't worry the problem of losing the card). Great helper for using, soon and conveniently. Cards needn't writting. Specifications: Quality: 100% Brand New and High Quality Color: Black color Material: Stainless steel, ABS plastic Accept Cabinet or Wardorbe Door Thickness: Within 30mm Apply Door: Wooden door only Power Supply: 4 * AA batteries (Not Include,Or can't passed the custom security checking) Battery Life Span: ≥1.5Years Operating Temperature: -30°C~+80°C Relative Humidity: 15,000V, information can be saved though in strong static. Static Power Consumption: <5μA Dynamic Power Consumption: about 200mA Low Voltage Alarm: <2.4V Can Be Connect Emergency Standby Power Supply: Yes Size: 7.5*7.5*3.0cm/ 3.0*3.0*1.2in(Lock Body);7*3.6*2.5cm/2.8*1.4*1.0in(Door holder); 8.5*5.5cm/3.3*2.2in(ID Card) Package Weight:197g/6.9oz Pacakge List: 1 * Lock Mortise (Lock Body) (Battery Not Included) 1 * Door Holder (Side Catch) 1 * Smart RFID ID Card 1 * Installation Screw Bag 1 * User Manual Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.