IB Card Hotel Lock 1. Great memory capacity, the button can memorize data max to 64K. 2. High Speed character, Read-Write can be finished once touch. 3. High security, 64 global exclusive serial yards are unable to model. 4. Long using life, the high-performance lithium battery inside and low consumption button guarantee the data can be stored more than 10 years. 5. Defending static, causticity, attrition, and waterproof etc. 6. The lock can be locked up automatically or manually. Electric Parameters: Input Voltage: DC6V Static Current: <3uA