1. Introduction
Thank you for choosing the Mr. Beams MB371 Remote Controlled Battery-Powered Motion-Sensing LED Outdoor Security Spotlight. This manual provides detailed instructions for the proper installation, operation, and maintenance of your new security light. Please read this manual thoroughly before use and retain it for future reference.
2. Product Overview
The Mr. Beams MB371 is a versatile, battery-powered LED spotlight designed for outdoor security and convenience. It features motion-sensing technology to automatically illuminate areas when movement is detected, and includes a remote control for manual operation. Its wireless design eliminates the need for electrical wiring, making installation simple and flexible.

Image: The Mr. Beams MB371 LED spotlight unit shown with its accompanying remote control. The spotlight features a motion sensor and an LED light, mounted on an adjustable base. The remote has buttons for ON, OFF, brightness adjustment, and motion sensor activation.
Key Features:
- Battery-powered wireless LED spotlight.
- Remote control range up to 75 feet.
- No electrical wiring required for installation.
- Durable construction suitable for all weather conditions.
- Motion-sensing activation for enhanced security.
3. Package Contents
Verify that all components are present before proceeding with installation:
- Mr. Beams MB371 LED Spotlight Unit
- Remote Control
- Mounting Hardware (screws and anchors)
- User Manual (this document)
Note: Batteries are not included and must be purchased separately. The unit typically requires D-cell batteries.
4. Setup and Installation
4.1 Battery Installation
- Locate the battery compartment on the back of the spotlight unit.
- Open the compartment cover by twisting or unlatching it.
- Insert the required D-cell batteries, ensuring correct polarity (+/-).
- Securely close the battery compartment cover to ensure weather resistance.
- For the remote control, open its battery compartment and insert the appropriate small battery (e.g., CR2032 coin cell), observing polarity.
4.2 Mounting the Spotlight
The MB371 spotlight can be mounted on various surfaces without the need for electrical wiring.
- Choose a desired mounting location. Consider areas where motion detection is beneficial, such as pathways, entryways, or storage areas.
- Use the provided mounting hardware (screws and anchors) to secure the spotlight's base to the surface.
- Adjust the angle of the spotlight to cover the desired area. The head of the spotlight is adjustable.

Image: A man is shown stacking firewood in a dimly lit outdoor area, which is effectively illuminated by a Mr. Beams spotlight mounted on a nearby tree. This demonstrates the practical application of the spotlight for lighting specific outdoor tasks or areas.
5. Operation
5.1 Motion Sensor Mode
Once batteries are installed, the spotlight will typically activate in motion sensor mode by default. It will turn on automatically when motion is detected within its range and in low light conditions, then turn off after a set period of inactivity.
5.2 Remote Control Functions
The remote control allows for manual operation and adjustment of the spotlight.

Image: A woman is shown indoors, pressing a button on the remote control. Outside, through a glass door, the Mr. Beams spotlight is visible, illuminating the outdoor area. This illustrates the convenience of controlling the light remotely from inside a building.
- ON Button: Press to manually turn the light on. The light can stay on for up to 4 hours in manual mode.
- OFF Button: Press to manually turn the light off.
- Brightness Buttons (Sun/Moon icons): Adjust the light output. The remote may offer different brightness levels (e.g., high, low).
- Motion Sensor Button (Person icon): Activates or deactivates the motion sensor function.
For optimal remote performance, ensure a clear line of sight to the spotlight. A long press (approximately 1 second) on the remote buttons may be required for activation.

Image: A woman is in a garden at night, holding a watering can and the Mr. Beams remote control. She is pointing the remote towards a spotlight mounted on a tree, which is illuminating the garden. This shows the remote's utility for controlling the light while performing outdoor activities.
6. Maintenance
6.1 Battery Replacement
When the light output diminishes or the unit stops responding, it is time to replace the batteries. Follow the battery installation steps in Section 4.1. Always replace all batteries with new ones of the same type for optimal performance.
6.2 Cleaning
To maintain optimal performance, periodically clean the lens of the spotlight and the motion sensor with a soft, damp cloth. Avoid using abrasive cleaners or solvents, as these can damage the unit.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Light does not turn on. | Dead or incorrectly installed batteries. Insufficient darkness for motion sensor. Motion sensor blocked. | Replace batteries, ensuring correct polarity. Test in darker conditions. Clear any obstructions from the motion sensor. |
| Light does not turn off. | Continuous motion detected. Unit malfunction. | Ensure no continuous motion is within sensor range. Remove and reinsert batteries to reset the unit. If problem persists, contact support. |
| Remote control not working. | Remote battery dead. Obstruction between remote and light. Out of range. | Replace remote battery. Ensure clear line of sight. Move closer to the spotlight. Try a long press on the button. |
| Light output is dim. | Low batteries. Brightness setting on remote. | Replace batteries. Adjust brightness using the remote control. |
8. Specifications
- Model Number: MB371
- Brand: Mr Beams
- Power Source: Battery Powered
- Light Source: LED
- Number of Lights: 1
- Voltage: 4.5 Volts
- Light Color: Cool White
- Wattage: 50 Watts (equivalent, actual LED wattage is lower)
- Lumens: 60, 90, 40 Lumen (variable output)
- Colour Temperature: 500 Kelvin
- Controller Type: Remote Control
- Indoor/Outdoor Usage: Outdoor
- Material: Plastic
- Item Weight: 0.34 Kilograms
- Assembly Required: Yes (mounting)
9. Warranty and Support
9.1 Manufacturer's Warranty
The Mr. Beams MB371 LED Outdoor Security Spotlight comes with a 1-Year Manufacturer's Warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use. It does not cover damage caused by misuse, accidents, unauthorized modifications, or improper installation.
9.2 Customer Support
For technical assistance, warranty claims, or further information, please refer to the contact details provided on the Mr. Beams official website or your purchase documentation.