Features 1??Initiative locking and unlocking prompt tone. 2??Dual control systems, one way to work and the other way to back up, ensure the normal use of the lock. 3??Automatically lock 20 seconds after remotely unlocked, regardless of closing the door or not. 4??Ultra modern appearance, overall modelling beautiful, arc design, the entire lock body is relatively thin. 5??Unique externally installed base panel design makes installation easier and firmer. Specification Features: Initiative locking and unlocking prompt tone. Dual control systems, one way to work and the other way to back up, ensure the normal use of the lock. Automatically lock 20 seconds after remotely unlocked, regardless of closing the door or not. Ultra modern appearance, overall modelling beautiful, arc design, the entire lock body is relatively thin. Unique externally installed base panel design makes installation easier and firmer. Remote controllers are programmed with encrypted digital conversion code which cannot be deciphered and copied, anti-technical unlock. The lock body can be locked and unlocked normally without battery, no need to worry about its failure of unlocking without battery power. Super power-saving control mode, extremely low power consumption, can be used for about 1 year with 4 AA batteries(excluded). Long service life, 300,000 times locking and unlocking without wear. Anti-rust battery box, battery box spring is made of special material for long time use. Lock tongue, panel and main parts are made of stainless steel and will never fade. Undervoltage lock protection function and alarm sound prompt function. Without automatic locking: remote control unlocking, remote control locking. Specifications: Condition: Material: Stainless steel Unlock Mode: Remote controller unlocking and backup button unlocking. Remote Control features: The system is paired with remote controller. Only the remote controller with successful code can open the lock remotely. Each lock can be equipped with a remote controller. Anti-theft Performance: Anti-technical opening, anti-universal key unlock, anti-card unlock, anti-violence damage Password Level: Indecipherable encrypted transformed digital signal, the mutual opening rate is zero. Remote Control Distance: 0--10m No. of Operation: 300,000 times Power Supply: 4 * AA dry batteries (excluded), remote control emergency power supply mode Battery Life: Normal use for 1 year Unlock Current: 120 mA Operating Temperature: -20??C ~ 70??C Operating Humidity: 25% ~ 80% Size: Approx.158*75*33mm/6.2*3.0*1.3in Package Weight: Approx.1065g/37.6oz Package List: 1 * Lock Body (with lock tongue) 1 * Screw Pack 4 * Remote Controller (built-in cell battery) 2 * Installation Tool 1 * Backup Battery (23A 12V) 1 * Wireless WIFI Nut 1 * User Manual