1. Un-Lock mode: single card mode, dual card mode,temporary card mode(one time use mode) 2. Power: AA Alkaline batteries* 4PCS. 3. Low battery alarm: when battery voltage is lower than 4.8V 4. Battery life: 10-15 months. 5.Additional power supply: extra power supply port(Audio type) 6.Bouncing function: When the lock opened by card, the cabinet door will be bounced automatically 7.Mechanical way to open the door, when it is out of order. 8.Working temperature: -15℃~60℃ 9. Application: gym/golf/spa/school/hotel/office etc