The Master Lock outdoor Bluetooth® padlock is opened via your smart phone It has a moulded outer casing and specially treated components to protect it from the elements It allows you to share access with friends family or even contractors without jeopardising your security You have the option to give permanent access restricted time access or even a 1-time entry code If you wish to give someone access and they don’t have a smart phone you can give them a 1-time directional access code If your phone battery dies then you can use a directional combination to access your property The padlock sends you a low battery notification and has a ‘jump’ facility allowing you to open the padlock and change the battery should it be completely flat The battery life expectancy is up to 5 years depending on methodfrequency of use Width 56mm Depth 27mm Height including shackle 134mm Vertical shackle clearance 51mm Horizontal shackle clearance 24mm Shackle diameter 9mm Battery replaceable CR2 Indoor or outdoor use