Master Lock Padlock, Outdoor Personal Use Bluetooth Lock, 2-7/32 in. Wide, 4401DLH Padlock application: for outdoor use; all-weather lock is best used for residential gates, sheds, garages, outdoor storage lockers and tool chests Ease of use: use your smartphone to unlock Bluetooth padlock, or enter directional code on lock keypad for easy backup entry when your smartphone isn't present Shared access: share temporary or permanent access via Bluetooth or keypad code with invited guests , monitor activity, and receive tamper and low-battery alerts all from your free Master Lock vault elocks app for Android and iOS. Designed for personal use, supporting up to 10 locks Durable design: padlock includes a 2-piece weather cover, metal body construction, boron Carbide shackle, and anti-shim locking mechanism for improved strength, security, and weather resistance; Plus military-grade Bluetooth authentication and encryption Dimensions: 2-7/32 in. Wide lock body; 11/32 in. Diameter shackle with 2 in. Length, 15/16 in. Width; extended length shackle for application flexibility Support: For answers to frequently asked questions, 2018 firmware updates, troubleshooting, and technical support, see document titled User Guide in the technical specifications section of this page Free iOS and Android eLocks App is designed for personal use, supporting up to 10 locks Keyless convenience: No need to worry over lost keys or forgotten combinations Durable full body all-weather cover protects internal lock components Gain greater flexibility and control: The Bluetooth padlock that allows you to share temporary or permanent access with guests or coworkers Monitor access history and receive tamper alerts Simple backup access using directional code on lock keypad Easy to replace, readily available CR2 batteries (included) Receive low battery notifications on padlock and in app Battery jump feature provides temporary power if battery dies while lock is locked