Card lock,hotel lock Satin pearl nickelLow consume,high sensitive 'Xeeder' RFID Technology PCB board. PCB board built-in buzzer and self-detect light. RFID Mifare 1K technology, contactless working Low Battery Voltage warning(beep and red light) 5 latch mortise free-engage handle while locking Powered by AA battery x 4PCS for 10-12 months' life Mifare 1K S50 card required,100,000 times write life ...