---
product_id: 44772719
title: "Key Lock Box with Code, Outdoor Lock Box for Realtors, Property Managers and Landlords, Ideal for Short-Term Rentals, Key Safe Holds 5 Keys, 5440EC"
brand: "master lock"
price: "$4170"
currency: MXN
in_stock: true
reviews_count: 8
category: "Master Lock"
url: https://www.desertcart.mx/products/44772719-key-lock-box-with-code-outdoor-lock-box-for-realtors
store_origin: MX
region: Mexico
---

# App-controlled access & monitoring Bluetooth-enabled smart lock Weather resistant to -40° Key Lock Box with Code, Outdoor Lock Box for Realtors, Property Managers and Landlords, Ideal for Short-Term Rentals, Key Safe Holds 5 Keys, 5440EC

**Brand:** master lock
**Price:** $4170
**Availability:** ✅ In Stock

## Summary

> 🔐 Unlock smarter, not harder — your keys, your rules.

## Quick Answers

- **What is this?** Key Lock Box with Code, Outdoor Lock Box for Realtors, Property Managers and Landlords, Ideal for Short-Term Rentals, Key Safe Holds 5 Keys, 5440EC by master lock
- **How much does it cost?** $4170 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.mx](https://www.desertcart.mx/products/44772719-key-lock-box-with-code-outdoor-lock-box-for-realtors)

## Best For

- master lock enthusiasts

## Why This Product

- Trusted master lock brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Multi-Key Capacity:** Spacious interior holds up to 5 keys or key cards securely in one place.
- • **Real-Time Monitoring:** Receive tamper alerts and track access logs instantly through the Master Lock Vault app.
- • **Seamless Integration:** Supports up to 10 locks on personal app, upgradeable to enterprise with scheduling platforms.
- • **Smart Access Control:** Manage temporary or permanent codes via Bluetooth or keypad—no Wi-Fi needed.
- • **Weatherproof Durability:** Built to withstand extreme outdoor conditions down to -40°, perfect for any location.

## Overview

The Master Lock 5440EC is a rugged, Bluetooth-enabled outdoor lock box designed for realtors, property managers, and landlords. It securely stores up to 5 keys or key cards, offers app-based access management without Wi-Fi, and provides tamper alerts and usage logs. Weather resistant to -40°, it’s ideal for vacation rentals, remote properties, and business use, with scalable app integration for personal or enterprise control.

## Description

The Master Lock 5440EC Bluetooth Portable Lock Box. Open and manage with your smartphone or with temporary or permanent codes. Monitor who visits and when through the App and notifications. Removable shackle can be managed with the App or a traditional code. Large capacity to hold key cards or traditional keys. Long life battery is easily replaceable. Solid body durability and coated surface to protect hardware and door finish. Works with the free Master Lock Vault App. Use the App or web to track usage

Review: Great experience - Great product, very sturdy and safe, the app takes a bit of time to understand, but my wife is smarter than me, so no problem! Super convenient not to have to key codes, works really well. Thank you.
Review: Good Box that Seems to Work Well - I bought this key safe box for my 91 yo father who has lost his house keys twice in the last 2 months. I figured that putting a key in the box outside his door was the best way to ensure that he'd never lock himself out. From the moment I received the box, I was impressed with it. It is heavy and has Bluetooth connectivity that allows it to be programmed from the Master Lock app. Plus you can download access logs to see exactly who and when used it. It can allow for several (I think up to 5 or 7) different access codes that can be personalized and assigned to different people allowing each person their own code and the ability to use their own phone to unlock the box via Bluetooth. It has lots of customization options and works better than I expected. The lighted keypad is a easy to see; the buttons are big and sound a tone and blink when you push them; and the ability to create long or short PINs is a plus. It feels sturdy and I think it would keep whatever you put inside it safe. I do have a couple constructive comments though... First, to open it, you have to grab it from both sides and pull on the flared edges of the door which folds down to open it. Though not a big deal, this would seem kind hard for someone with grip issues. I assume it's built like this so you can't easily take a pry bar to the key safe, which I understand, but it also makes it a little harder to use for people with disabilities or the elderly... Or if it got wet, it might just be a little hard to open for a regular person if it got slippery. Maybe if the door popped open slightly when disarmed, that would be helpful and make opening the door a little easier. Lastly, I have more of an installation tip than a criticism... maybe a criticism of the directions. When you install the Master Lock app and assign phone privileges to the app, make sure that you set the privileges for the app to access your phone's Bluetooth all of the time, not just when the app is running. I know this sounds strange, but I had all sorts of connectivity issues with the app communicating with the box when the app only had privileges when the app was on. The app would recognize the box but it wouldn't update it consistently with the new passcodes. It would download the access log, but I sometimes had a problem unlocking the box using the app. The app would see the key safe, but didn't seem to stay connected to it. The BT connectivity was very shoddy until I changed the apps privileges. Once I did that, the app recognized the box consistently and worked as designed. Unfortunately, I don't remember seeing anything in the directions about this tidbit, and there's no troubleshooting section in the included fold out directions to help you. The directions are poor and basic at best and barely helped you through the install process. Maybe if I had known how to set the app's permissions from the directions, my comments would be different, but unfortunately, that tidbit of info isn't there and so it tainted my experience until I figured it out. It was so bad I even considered returning the key safe as defective. Luckily I installed the app on my Android phone and noticed the "allow use all the time" privilege that I didn't see as a choice so I didn't select it the first time I installed the app on my Dad's Android phone. (My Dad has a Motorola phone, and I have a Samsung). Once I went into the app's privileges and fixed it, all the issues I had went away. Needless to say, it's working now and I think it'll provide the security that my Dad needs.

## Features

- For indoor or outdoor use; portable lock box is best used for key and access card storage; large internal cavity allows secure storage for multiple keys; weather resistant to -40°. Schedule access now or in the future.
- Share temporary or permanent access via Bluetooth or keypad code with invited guests (Wi-Fi connection is not required to operate); Monitor activity, and receive tamper and low-battery alerts
- Ideal for use on Airbnb and VRBO vacation rental properties, unmanned remote locations, and real estate
- Master Lock Vault Home and Enterprise Apps are designed for personal use, supporting up to 10 locks. Can be upgraded to Master Lock Vault Enterprise business platform, and integrated with ShowingTime and BrokerBay scheduling management
- 3-1/4 in. wide lock body, 13/32 in. diameter shackle with 1-13/16 in. length, 1-13/32 in. width; Internal dimensions 3-39/64 in. height, 2-1/2 in. width, 1-7/64 in. depth; Replaceable CR123A battery (included); Lock box is not intended to securely fit key fobs inside
- For answers to frequently asked questions, troubleshooting, and technical support, see document titled User Guide in the technical specifications section of this page
- Comes with easy to replace CR123A battery

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Master Lock |
| Item dimensions L x W x H | 1.13 x 3.25 x 4.8 inches |
| Lock Type | Electronic |
| Material | Metal |
| Recommended Uses For Product | Vacation rental properties, unmanned remote locations, real estate, and business applications with multiple locks and users Recommended Uses For Product Vacation rental properties, unmanned remote locations, real estate, and business applications with multiple locks and users See more |
| Special Feature | Portable |

## Product Details

- **Brand:** Master Lock
- **Item dimensions L x W x H:** 1.13 x 3.25 x 4.8 inches
- **Lock Type:** Electronic
- **Material:** Metal
- **Special Feature:** Portable

## Images

![Key Lock Box with Code, Outdoor Lock Box for Realtors, Property Managers and Landlords, Ideal for Short-Term Rentals, Key Safe Holds 5 Keys, 5440EC - Image 1](https://m.media-amazon.com/images/I/51O7QzFcuaL.jpg)

## Available Options

This product comes in different **Pattern, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great experience
*by O***E on November 20, 2025*

Great product, very sturdy and safe, the app takes a bit of time to understand, but my wife is smarter than me, so no problem! Super convenient not to have to key codes, works really well. Thank you.

### ⭐⭐⭐⭐⭐ Good Box that Seems to Work Well
*by E***E on April 13, 2021*

I bought this key safe box for my 91 yo father who has lost his house keys twice in the last 2 months. I figured that putting a key in the box outside his door was the best way to ensure that he'd never lock himself out. From the moment I received the box, I was impressed with it. It is heavy and has Bluetooth connectivity that allows it to be programmed from the Master Lock app. Plus you can download access logs to see exactly who and when used it. It can allow for several (I think up to 5 or 7) different access codes that can be personalized and assigned to different people allowing each person their own code and the ability to use their own phone to unlock the box via Bluetooth. It has lots of customization options and works better than I expected. The lighted keypad is a easy to see; the buttons are big and sound a tone and blink when you push them; and the ability to create long or short PINs is a plus. It feels sturdy and I think it would keep whatever you put inside it safe. I do have a couple constructive comments though... First, to open it, you have to grab it from both sides and pull on the flared edges of the door which folds down to open it. Though not a big deal, this would seem kind hard for someone with grip issues. I assume it's built like this so you can't easily take a pry bar to the key safe, which I understand, but it also makes it a little harder to use for people with disabilities or the elderly... Or if it got wet, it might just be a little hard to open for a regular person if it got slippery. Maybe if the door popped open slightly when disarmed, that would be helpful and make opening the door a little easier. Lastly, I have more of an installation tip than a criticism... maybe a criticism of the directions. When you install the Master Lock app and assign phone privileges to the app, make sure that you set the privileges for the app to access your phone's Bluetooth all of the time, not just when the app is running. I know this sounds strange, but I had all sorts of connectivity issues with the app communicating with the box when the app only had privileges when the app was on. The app would recognize the box but it wouldn't update it consistently with the new passcodes. It would download the access log, but I sometimes had a problem unlocking the box using the app. The app would see the key safe, but didn't seem to stay connected to it. The BT connectivity was very shoddy until I changed the apps privileges. Once I did that, the app recognized the box consistently and worked as designed. Unfortunately, I don't remember seeing anything in the directions about this tidbit, and there's no troubleshooting section in the included fold out directions to help you. The directions are poor and basic at best and barely helped you through the install process. Maybe if I had known how to set the app's permissions from the directions, my comments would be different, but unfortunately, that tidbit of info isn't there and so it tainted my experience until I figured it out. It was so bad I even considered returning the key safe as defective. Luckily I installed the app on my Android phone and noticed the "allow use all the time" privilege that I didn't see as a choice so I didn't select it the first time I installed the app on my Dad's Android phone. (My Dad has a Motorola phone, and I have a Samsung). Once I went into the app's privileges and fixed it, all the issues I had went away. Needless to say, it's working now and I think it'll provide the security that my Dad needs.

### ⭐⭐⭐⭐⭐ Simple to Install, Looks Extremely sturdy
*by S***Y on August 6, 2025*

This seems to be a very secure box. It is hard to grab onto to try to leverage off the wall. I found the app quite intuitive. I only have two suggestions. The product should come with instructions on which app to install. There is an enterprise app, and a home app. The former fills up the screen and you have to scroll to discover the second one. I recommend using longer screws. After penetrating the siding or stucco of your house, there is about an inch left to penetrate studs. I substituted 2 inch screws.

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*Product available on Desertcart Mexico*
*Store origin: MX*
*Last updated: 2026-02-21*