Name: Master Lock 5440EC
Brand: Master Lock
SKU: B071VGZ283
Price: 72.99 USD
Availability: InStock
Rating: 4.1 (620 reviews)

Expert Review Analysis

The Master Lock 5400D is a portable, over-the-knob key lock box designed for secure, keyless outdoor storage of keys. It features a set-your-own 4-digit combination, a large internal cavity to prevent jamming, and a weather cover to protect the dials from environmental elements.

✓ Best for: Real estate agents needing portable access for property showings. Homeowners or renters granting short-term access to service providers. Vacation rentals or Airbnbs requiring secure guest key storage. Security gates or fences in weather-exposed areas requiring temporary access✗ Not ideal for: High-security permanent setups requiring wall-mounting for maximum stability. Users needing significantly larger storage capacity for keys, fobs, and cards. Permanent installations where portability is not a required feature

Pros

✓Over-the-knob design allows for quick, portable installation without permanent mounting hardware
✓Set-your-own 4-digit combination code provides customizable and secure access control
✓

Best Seller Rank History

Now#51Best#23Worst#394 -14

Lower = better sales rank

Specifications

Design

Height122 mm mm

Width83 mm mm

Depth29 mm mm

Body Thickness10 mm mm

Shackle Length46 mm mm

Features

Lock Type4-digit combination

Mounting StylePortable over-the-knob

Weather ResistanceWeather resistant to -40°

Key Capacity5 keys

ConnectivityBluetooth

General

BrandMaster Lock

Model5440D

ColorSilver & Black

WarrantyLimited One Year Warranty

Weight500 g g

Power

Battery TypeCR123A

Battery IncludedYes

Security

Code TypeSet-your-own 4-digit combination

Construction

Body MaterialMolded body with vinyl-coated shackle

Protection

Weather ResistanceWeather cover on dials to protect from freezing, grime, and rain

Dimensions & Weight

Height4.8 inches

Width3.25 inches

Depth1.125 inches

Weight1.10231131 pounds

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Master Lock 5440EC

Expert Review Analysis

Best Seller Rank History

Specifications

Design

Features

General

Power

Security

Construction

Protection

Dimensions & Weight

Research Sources

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