Features 1??Concealed remote control lock, specially designed for home security. 2??For Tuya WiFi smart lock, supports remote unlocking of mobile phones, and can realize intelligent linkage with other for Tuya?supported products. 3??2 kinds of unlocking / locking methods: mobile phone WiFi remote, remote control. 4??The remote control password can be modified. Once the remote control is lost, you can modify the its password immediately, and the lost remote control is no longer valid. 5??There is no keyhole outside, no opportunity for thieves, which is anti-theft, enhanced home safety. 6??When the battery level is too low, the LED light flashes and an alarm sounds to remind you to replace the battery. When the power is used up, it will automatically unlock. 7??Simple and convenient installation, no additional wiring is required. 8??Made of high-quality zinc alloy material, durable and stable. Specification Condition: Item Type: Remote Control Lock Color: As picture Shown : WAFU Host: Power Supply: 2 x AA Batteries (Not Included) Transmission Frequency: 433mhz (?? 500khz) Operating Range: Within 20 Meters/65.6ft Unlock Mode: Remote Control Unlock, Mobile Phone Wifi Remote Unlock Material: Zinc Alloy Size: Approx. 15.5 x 8 x 3.5cm/6.1 x 3.1 x 1.4in Remote Control: Single Remote Control Battery: 1 x CR2032 3V (included) Quantity: 4 (Included) Maximum Number of Controllers: 16 (Not Included) Function: Lock and Unlock Color: Silver Single Remote Control Size: Approx. 6 x 3 x 1cm/2.4 x 1.2 x 0.4in Package List 1 x For Tuya WiFi Remote Control Lock 1 x Wifi Adapter 1 x Lock Body Bracket 1 x Buckle 4 x Remote Control 1 Pack of Mounting Screw 1 x USB Cable 3 x Fixed Tape 1 x Instruction