Installation Instructions for Xiaomi Mijia Aqara S2 Smart Door Lock Specification: Brand: Aqara Product Name: Aqara S2 Smart Door Lock Accessory Kits Size: No. Door Thickness 1 40-54mm Thickness Door 2 55-95mm Thickness Door 3 96-120mm Thickness Door Standard lock body: Fits for 40~54mm/55-95mm/96-120mm Thickness Door Fits for Both Left Open & Right Open Door Unlock Method: Fingerprint, Password, Key Product Dimension: 375.5×75.5x25mm (No Contain Door Handle) Surface Treatment: Baking Finish, Electroplating Color: Grey Lock Body: 6068 Stardard Lock Bolt Material: 304 Stainless Steel Lock Core Grade: C Grade Can Input 25 Sets of Passwords Can Input 25 Sets of Fingerprints Password Length: 6-10 Bit, Support 20 bit of virtual password Working Temperature: -25℃~55℃ Wireless Protocol: Zig bee Battery: 4 or 8Pcs AA Battery Emergency Power Supply: Mic ro USB Standby Time: Approx. 12 Months (10 Times/Day) Remote Control: No Auto Information Notification: Wrong Fingerprint and Password Input Reminder (wrong input three times, temporarily locked for 5 minutes); Low Power Reminder; Lockpicking Reminder Active Alarm: Lockpicking, Low Battery Level APP Download: Mi Home (on Mainstream APP market, English Language) Features: It can be coordinated with many Aqara devices. When the door is unlocked at home, theroom will automatically light up, the water h eater will be heated automatically, and the curtains will be opened quietly. These smart devices make the home more comfortable and warm. Connect with other intelligent devices through Zigbe e communication protocol, and the response speed is fast. The instability and interruption of the wireless network in the home will not affect the experience. The integrated intelligent home automation need to be realized through the gatewa y. FAQ: Q: Can I use APP to unlock the lock remotely? A: There are some vulnerabilities in the Wifi router, which leads to the security risk of the remote unlock function being deliberately attacked by hackers. Therefore, our lock does not support the remote AP P unlock. Q: Do smart locks have to be used together with gatewa y devices? (Like Xiaomi Upgrade Gatewa y) A: Without gatewa y, you can also input fingerprint, password, locks can be used normally. The gatewa y device can realize the coordinated control with other devices and then you can also check the lock status through the AP P application. Note: Select the corresponding accessory kits according to the thickness of your door. Package Included: 1 x Aqara S2 Smart Door Lock 1 x Lock Core 3 x Keys 1 x Instruction