Feature: 1. There are two unlocking methods, wireless remote control unlocking/locking the controller, and mobile phone Bluetooth unlocking/locking. 2. Bluetooth smart lock can also achieve intelligent interaction with other support for TUYA products. 3. Invisible lock, only supports indoor installation and use, dual circuit, high performance, fast identification, dry battery power supply. 4. Zinc alloy shell, sturdy and durable, maximize durability. Simple and convenient installation, no additional wiring required. 5. Wide range of applications, suitable for all types of doors: wooden doors, glass doors, metal doors, etc. Specification: Item Type: Remote Control Lock Material: Zinc Alloy Model: 019 Remote Control Main Lock: Frequency: 433Mhz (±50Khz) Remote Control Range: Approx. 0.5-15m/0.55-16.40yd Working Environment: -10-60℃, 5-60% Power Supply: 4 x AA Batteries (Not Included) Battery Life: 20 Times a Day, about 6 Months Unlock Mode: Remote Control Unlock//Mobile Phone Bluetooth Unlock Product Size: Approx. 155 x 80 x 35mm/6.10 x 3.15 x 1.38in Remote Control: Standard Quantity: 4 Remote Control Range: Approx. 0.5-15m/0.55-16.40yd Working Humidity: 5-60% Power Supply: 1 x CR2032 Button Battery, 100mAh (Built-In Battery) Battery Life: It is Recommended to Replace it Every 6 Months Remote Control Registration Number: Up to 20 Can Be Registered Transmission Method: Frequency Conversion Signal Every Time to Prevent Duplication How to use: 1. Insert 4 x AA batteries (not include) into the product, and then use the remote control to unlock the lock. 2. Download for TUYA Smart APP on the mobile phone, turn on the bluetooth of the mobile phone, and then for Tuya bluetooth adapter is inserted into the power plug to connect to the lock. Use the bluetooth of the mobile phone to connect to the lock, Use your phone to unlock. Package List: 1 x Remote Control Lock4 x Remote Control1 x USB Adapter1 x Lock Box Bracket1 x Fixator1 x Installation Accessory Kit1 x USB Data Cable3 x Adhesive1 x English Manual