Specification standard European Standard 30 30 35 35 40 40 60 40 75 40Unlock RFID Smart Card Password KeyColor Silver BlackBattery Type AAA BatteryBattery Replacement ReplaceableMaterials 304 Stainless Steel Aluminum PlasticWaterproof Grade IP44Automatic Lock YesAdjustable Door Lock Time YesLow Battery Reminder Function YesWorking Temperature 30 60 degree Scramble Passcode Aryclic Touch KeypadPassword support 4 8 digitalsSupport the Anti Peeping Virtual Password enter Input the random passcode before or after the correct password This makes your door much secured Mechanical Key UnlockMechanical keyExternal power supply interface as spare in case the batteries is dead Long Life Battery CaringThe Smart lock is an advanced smart lock offering Airbnb integration and high tech automated features The automatic lock feature can adjust the time for the ultimate security setting The long life battery ensures the quality utilizing With the easy getting change of batteries it saves up and be more convenient when power off How To Install ●Simply use a hex screwdriver to install in 3 minutes●No breaking the door or change the door body Measurement C001A will fit on any door with a thickness of 55 105mm with an industry standard deadbolt bore hole that is 2 1 8 in diameter Each lock comes with rubber spacers to help create the most secure fit The dimensions are included in the diagram below to show the actual size Suitable Cylinder TypesOur European stan