Master Lock 4401DLH Bluetooth Lock 

• Use Your Smartphone to Open and Manage Door with Master Lock Vault App
• Includes Master Lock Vault Enterprise IOS / Android App and Web Interface, Designed for Business Applications Working with Many Locks and Many Users
• Secure Door Access: Only Authorized Devices Can Enter; Grant or Revoke Access
• Backup Access Using Direction Code on Lock Keypad
• Share Access with Others - Either Temporary or Permanent
• Audit Trail Keeps All Data & History; Easy to Replace CR2 Battery
• Low Battery Notification and Reminder on Padlock and in IOS / Android App
  
• Battery Jump Allows for a Temporary Access if Battery Dies While Locked
• Specs_Width: 2-7/32" Wide; A: 11/32 (9mm) B: 2" (51mm) C: 15/16 (23mm)
  
• Best Used For: School Lockers, Employee Lockers, Athletic Lockers, Indoor Storage Lockers; Residential Gates & Fences; Sheds, Workshops & Garages; Tool Trunks, Tool Boxes & Tool Cribs, Self-Storage Units & Lockers