Weatherproof Mechanical Keyless Password Door Security Lock for Home OfficeSpecifications: Mechanical lock, does not requires battery or extra wires Keyless Mechanical lock, unlock by code without any keys Programmable unlock code up to 11 digits All weather operation Functions in severe temperature 13 digit alphanumeric keypad and clear key Easy to install User friendly Fits in both right and left opening doors Applicable for door with 35 60 mm thick door Swing button for controlling locking of door Color : Silver Technical