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Quick Details

  • Brand Name: MASTER LOCK
  • Model Number: 4400D

Manufacturer's Link: http://www.masterlock.com/personal-use/product/4400D?utm_source=Commercial_Distributor_Emails_041216&utm_medium=email&utm_content=link&utm_campaign=BLE_Distributors_041216&spMailingID=25218773&spUserID=MjUzMDgzMDkwNjIwS0&spJobID=781870019&spReportId=NzgxODcwMDE5S0


1-29/32" Indoor Bluetooth Smart Padlock

The Master Lock No. 4400D Bluetooth Smart® Padlock features a 1-29/32in (47mm) wide metal body for durability. The 9/32in (7mm) diameter shackle offers 7/8in (22mm) vertical clearance and is made of boron carbide, offering maximum resistance to cutting and sawing. The smartphone/app interface offers speed, ease of use, & greater control with the ability to share access; with keyless convenience. The locking mechanism features anti-shim technology, offering maximum security. The 1 Year Limited Warranty provides peace of mind from a brand you can trust.


  • Use your smartphone to open your lock with the free Master Lock Vault eLocks app
  • Never worry about a forgotten combination!
  • Share access with others - temporary or permanent
  • Share 24/7 access or limit to days or nights
  • Monitor access history & receive tamper alerts
  • Backup access using directional code on lock keypad
  • Low battery notification & reminder on padlock and in app
  • Comes with easy to replace CR2450 battery
  • Battery jump allows for temporary access if battery dies while locked
  • Locker Mode setting allows for storage inside a locker
  • Compact footprint fits most lockers
  • Hardened boron alloy shackle for superior cut resistance
  • Body Width 1-29/32in (47mm)
  • Shackle DimensionsA: 9/32in (7mm) B: 7/8in (22mm) C: 13/16in (20mm)
  • Color Silver and Black

Best Used For

  • Indoor Storage Lockers
  • Cabinets
  • School, Employee, & Athletic Lockers
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