... function,high security 2.Zinc alloy material,fadeless,durable 3.Wireless lock system 1.Electronic lock characterSuitable for hotel ,apartment,office ... ,high security;Door openning in 1-2 seconds when the RF card on the sensor cover of the lock;Working voltage ... records at least 200 unlocking transaction;Used lock software with RF induction unlocking card it can be customised according to your ...