SPECIFICATIONSBatteries Required: 4PCS AAA Alkaline BatterysBrand Name: ViladepotCertification: FCCConnectivity: BluetoothDoorknob Funcition: Biometric,Key & KeypadEmergency Power Supply: TYPE-C InterfaceFinish Type: PaintedFit Door Thickness: 35-55mmHandle Direction: Direction ReversibleHigh-concerned chemical: noneModel Number: D2Origin: Mainland ChinaPower Source: DRY BATTERYPower Supply: DRY BATTERYProtection Level: No WaterproofScope of application: Interior DoorSilent Mode: YesSmart home platform: TuyaSuitable Door Type: Glass Door,Wooden Door,Brass Door,Stainless Stell Door,Steel Door,OtherSuitable for Mortise: 6068Ways To Unlock: Mechanical Keys,Password,FINGERPRINT,Bluetooth,AppViladepot Smart Lock Fingerprint Door Lock App Control Passcode Unlock Electronic Touchscreen Keypad Indoor