Master Lock 5441EC
Score: 88/100
Master Lock 5440EC
Score: 85/100Rankings
The Master Lock Digital Lock Box (5441EC) is a high-security, smart key safe featuring Bluetooth app control and military-grade encryption. It offers advanced features like shareable codes and tamper alerts but is bulkier and heavier than mechanical alternatives. It is best suited for realtors and property managers needing auditable, shareable access without keys.
The Master Lock 5440EC is a portable, smart key lock box designed for realtors and property managers who need flexible, temporary access control. Its key strength lies in its Bluetooth connectivity and app integration, allowing for tamper and low-battery alerts. While it lacks the permanent stability of wall-mount options, it is ideal for short-term rentals and property showings.
| Attribute | | |
|---|---|---|
5 keysbest | 5 keysbest | |
5.36 cm | 12.2 cmbest | |
13.46 cmbest | 8.3 cm | |
20.57 cmbest | 2.9 cm | |
| ↓ lower better | 1.18 kg | 0.5 kgbest |
— | 46 mmbest | |
1 yearsbest | 1 yearsbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Durability & Environment(1) | ||
Weather Resistance Rating | weather_resistant | Weather resistant to -40° |
Installation & Mounting(1) | ||
Mounting Type | wall_mount | Portable over-the-knob |
Design & Fit(3) | ||
External Height (cm) | 5.36 cm | 12.2 cm |
External Width (cm) | 13.46 cm | 8.3 cm |
External Depth (cm) | 20.57 cm | 2.9 cm |
Build & Design(2) | ||
Body Material | metal | Molded body with vinyl-coated shackle |
Product Weight (kg) | 1.18 kg | 0.5 kg |
Smart Features(1) | ||
Smart App Compatibility | ios_android | Master Lock Vault Home and Enterprise Apps |
Power & Battery(1) | ||
Battery Type | cr123a | CR123A |
Security & Access(1) | ||
Lock Type | smart_electronic | 4-digit combination |
Products in the top-left offer the best value (high score, low price).
Professional reviewers and editors praise the Master Lock Digital Lock Box for its unmatched security, simplicity, and accountability. Editors highlight its rock-solid construction and high-security features that protect against physical attacks and hacks.
Everyday consumers generally rate the product highly, with over 80% recommending it for its convenience. Users commonly praise the ease of sharing access codes for guests and service providers, as well as the reliability of app alerts for battery and tampering.
Master Lock's official descriptions characterize the 5400D as a reliable key safe for home or rental use, emphasizing its secure, keyless access and anti-jamming design.
Official notes imply user-friendly operation and convenience for rentals and real estate, suggesting positive reception for its intended temporary access use cases.
“Shared temp code for cleaner-perfect!”
“App won't connect sometimes; keypad saves it but frustrating.”
