Disclosure: This guide contains affiliate links. We may earn a commission if you make a purchase through these links—at no extra cost to you.
Published: 13 June 2025
Overview
The MASTER LOCK Smart Connected Key Safe Wall Mounted offers secure key and access card storage with smart Bluetooth connectivity and weather-resistant durability. Ideal for home, office, or vehicle use, it provides a modern solution for safely managing physical keys—without the need for face-to-face handovers. This review covers installation, features, usability, and how it compares with other smart key safes in 2025.
Installation Process
Installation is straightforward with included mounting hardware and template. The device measures 127mm (H) x 83mm (W) x 59mm (D) and is designed for wall mounting on brick, wood, or concrete. Once installed, users can activate the device via the Master Lock Vault app using the engraved Device ID (located underneath the unit).
Daily Use and App Control
You can unlock the box via Bluetooth when your phone is nearby, or enter a secure backup code directly on the keypad. For safety, the Bluetooth unlock will not function unless your phone is within range. The app allows easy access scheduling, usage tracking, and tamper alerts, offering full control for property owners, tradespeople, and Airbnb hosts.
Smart Features and Shared Access
Grant temporary or permanent access via the Master Lock Vault app for iOS/Android. Invite guests, view access logs, and get notified if the unit is tampered with or has low battery. Schedule specific access times using pre-set templates—ideal for letting in cleaners, contractors, or deliveries at specific windows.
Durability and Power
Made from heavy-duty zinc alloy, the safe is IP65-rated for water and dust resistance—operational even in -40°C UK winters. The keypad is backlit for night use and sealed against weather. It runs on a CR123A battery (included) with long life and alerts when replacement is needed. If the battery runs flat, the external 9V contact point allows emergency access.
No Hidden Fees or Contracts
Unlike some competing products, the MASTER LOCK key safe does not require any subscriptions, monthly access fees, or activation charges. You get full app functionality, Bluetooth access sharing, and smart scheduling for a one-time purchase—no ongoing costs.
Pros
- Smart Bluetooth and keypad access
- Weatherproof, wall-mounted build
- No app or subscription fees
- Tamper and low battery alerts
- Ideal for homes, vehicles, and rentals
Cons
- No smart assistant (Alexa/Google) integration
- Requires smartphone proximity for Bluetooth unlocking
- Not suitable for storing large key fobs
How It Compares
Compared to alternatives like Igloohome Smart Keybox or Yale Smart Cabinet Lock, the MASTER LOCK model offers a stronger physical build and zero recurring costs. While it lacks voice assistant support, it shines in simplicity, value, and weather resilience—making it ideal for outdoor use and high-traffic rental properties.
Final Verdict
The MASTER LOCK Smart Connected Key Safe is a reliable, cost-effective solution for secure key management. With Bluetooth and keypad access, real-time alerts, weatherproof design, and no hidden fees, it’s a smart investment for landlords, Airbnb hosts, and security-conscious homeowners in 2025.
★★★★☆ (4.5/5)