Backlit KeyboardThe backlight makes it easy to see at night and easier to use. Use high-quality metal material, wear-resistant, high temperature resistant, with surface protection. Resistant to use.You need to access the control systemmainly for business; laboratories; factories; warehouses; apartments; building; corporate building; companies; banks; prisons; If you have any questions; please via; we are at your disposalLatest microprocessor technology for door locking and security systems that require immediate (timed) closing. 8 assistance modes including: door ajar, door forced, shunt, door monitoring, normal/safe.Wide applicationWorks with electromagnetic locks, access control systems and controls other electrical or alarm devices. The device can be safely installed outdoors as it is weatherproof.Built-in memoryAll device codes and settings are safely stored in a built-in memory. The device will not forget the saved settings and codes in the event of a power failure.