Brand Name: Viladepot High-concerned chemical: none Origin: Mainland China Application: Interior Door Fit Door Thickness: 35-50mm Surface Finishing: Lacquered Certification: FCC Material: Aluminum alloy Keys Included: Yes Style: Knob Locks Lock Type: Electronic Lock Unlock Mode: FINGERPRINT Model Number: D2 is_customized: Yes APP: Tuya Connection Method: Bluetooth Batteries Required: 4PCS AAA Alkaline Batterys Emergency Power Supply: TYPE-C Interface Silent Mode: Yes