4400D Bluetooth Padlock

4400D Bluetooth Padlock
In stock
Regular Price: $71.54
On Sale For: $39.99

Masterlock No. 4400D Bluetooth® Smart Padlock


Product Schematic for 1525
SKU 4400D
Product Type Bluetooth® Smart Padlocks
Shackle Diameter (A) 9/32" (7mm)
Shackle Clearance (B) 7/8" (20mm)
Shackle Width (C) 13/16" (20mm)
Manufacturer Master Lock
Battery CR2450
Packaging Retail Carded
Body Width 2-1/8" (54mm)
Warded No
Shrouded No
Covered No
Rekeyable No
Key Retaining No
The Master Lock No. 4400D Bluetooth® Smart Padlocks feature a 2in (51mm) 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, and 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. BLUETOOTH is a registered trademark of Bluetooth SIG, Inc.

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
  • Control key for supervisory access; specify key to match existing system or factory assigned
  • Backup access using directional code on lock keypad
  • Low battery notification and reminder on padlock and in app
  • Comes with easy to replace CR2 battery
  • Battery jump allows for temporary access if battery dies while locked (9v Battery Required for Jump)
  • Locker Mode setting allows for storage inside a locker
  • Injection molded body cover, elastomer shackle seals and weather protected internal components
  • Hardened boron alloy shackle for superior cut resistance