1、Fully mechanical, absolutely no batteries or a power source required. No keyholes means this lock cannot be picked. 2、Keyless entry, enjoy the convenience and peace of mind of keyless entry and exit. The button is sensitive, good touch feeling, easy to enter password. 3、Ideal for commercial or residential, suitable for gate, parking lot, for Airbnb, short term rental, storage area or safe access area. 4、Made of the highest quality zinc alloy material, it is rust proof, anti corrosion, durable and has a long service life. 5、The sturdy fixing bolts designs, no noise, provides you with a quiet experience. It is anti theft, easy to install. Item Type: Mechanical Combination Lock Material: Zinc Alloy Color: As shown in the picture Password Panel Size: Approx. 142x42x40mm / 5.59x1.65x1.57in Rubber Seal Ring Size: Approx. 148x50mm / 5.83x1.97in Rubber Sealing Hole Diameter: Approx. 10mm / 0.4in The Distance Between the Rubber Sealing Hole Diameter and the Center Point of the Hole Diameter: Approx. 130mm / 5.1in Password Length: 1-11 digits Applicable Door Thickness: 10-60mm / 0.39-2.36in Working Temperature: -20+60℃ Applicable Environment: Waterproof and high temperature resistant Applicable Type: Indoor/outdoor door Function: No need for battery or wired power Weight: Approx. 1288g / 45.4oz 2 x Door Lock Panel 2 x Rubber Pad 1 x Lock Tongue 1 x Door Holder 1 x Door Stopper 2 x Short Screw 1 x Screw 3 x Long Screw 1 x Square Bar 1 x English Manual