Master Lock 6400EURLJENT Bluetooth Outdoor Padlock • 9 mm chrome-plated boron alloy shackle • 62 mm wide zinc lock body • Easy smartphone app access and monitoring • 10-digit keypad alternate access • Area for custom marking • Includes Vault Enterprise IOS and Android app, and web interface • Low battery notification & reminder on padlock and in app • Comes with easy to replace CR123A battery • Below compartment with screws to change battery