Note: With BT adapter, can achieve lock\/unlock by phone APP. Note: The User Manual is common version. This product is 315MHz not 433MHz, and without touch lock\/unlock function. Features: *No lock hole design, it completely abandons the traditional key and lock, open and close by remote control or phone APP, realized real security. *Tiger lock method, more safe and stable. No keyholes outside, there is no way for thieves. *Add USB external power source function. Make sure the lock works when battery was dead. (battery not included) *Three unlock modes optional: Phone APP unlock, Remote control unlock, Indoor emergency button unlock. *Easy installation on all kind of doors, very convenient. Specifications: Host Machine: Power Supply: 2*AA batteries(not included) Transmission Frequency: 315MHz(500KHZ) Operation Range: Within 15m Unlock Mode: APP unlock\u0026Remote control unlock\u0026 indoor emergency button unlock APP Support: iOS\/Android Color: Silver Item Size: 15.5*8*3.5cm Item Weight(without accessories): 529g Remote Controller: Power Supply: Lithium button battery Standard Number: 4 (included) Max Controller Number: 16 (not included) Function: Lock \u0026unlock Item Size(Each): 6*3*1cm Item Weight(Each): 25g Package Information: Package Size: Approx. 22.2*19.8*5.8 \/ 8.47*7.8*2.28in Package Weight: Approx. 1060g \/ 2.3lb Package List: 1* Lock 1* Lock Body Holder 1* Lock Catch 1* USB Power Cable 4* Remote Keys 1* BT Adapter 1* Bag of Mounting Screws 1* User Manual(English)