1. Introduction
This manual provides comprehensive instructions for the setup, operation, and maintenance of your Samsung Bluetooth Slim Mouse. Please read this manual carefully to ensure proper use and to maximize the performance and lifespan of your device. Keep this manual for future reference.
2. Package Contents
- Samsung Bluetooth Slim Mouse (EJ-M3400DBEGUS)
- AA Battery (may be pre-installed or included separately)
- Quick Start Guide (this document)
3. Product Overview
The Samsung Bluetooth Slim Mouse is designed for comfort and portability, offering a seamless wireless experience. It features a sculpted design for a comfortable grip and is slim enough for easy transport.

Image: Samsung Bluetooth Slim Mouse, Black. This image shows the top view of the black mouse, highlighting its slim profile and button layout.
Key Features:
- Bluetooth 5.0 Connectivity
- Samsung Easy Pairing
- LED indicator for power, pairing, and connection status
- 1000 DPI optical sensor
- 5 Buttons + 1 Scroll Wheel (with push function) + Power Switch
4. Setup
4.1. Battery Installation
- Locate the battery compartment cover on the underside of the mouse.
- Gently lift the cover from the back side. The cover is held by magnets.
- Insert one AA battery, ensuring the polarity (+/-) matches the diagram inside the compartment.
- Align the cover and gently press it back into place until it snaps securely. Ensure the left and right clickers align properly.
4.2. Bluetooth Pairing
To connect your mouse to a device:
- Turn on the mouse using the power switch located on the underside. The LED indicator will light up.
- On your computer or device, navigate to the Bluetooth settings.
- Press and hold the Bluetooth pairing button on the mouse (usually located near the power switch or battery compartment) until the LED indicator begins to cycle through colors (red, green, blue). This indicates the mouse is in pairing mode.
- On your device, select the Samsung Bluetooth Slim Mouse from the list of available Bluetooth devices. A notification may appear to confirm the connection.
- Once connected, the LED indicator will show a steady color or turn off, depending on the mouse's status.
Note: If the mouse cursor appears but is non-functional after turning on, repeat step 3 to re-initiate the pairing process.
5. Operating Instructions
5.1. Button Functions
- Left Click: Primary selection and activation.
- Right Click: Accesses contextual menus.
- Scroll Wheel: Scrolls content vertically. Pressing the scroll wheel may activate middle-click functions or custom assignments.
- Side Buttons: Typically function as 'Forward' and 'Backward' for web browsing or file navigation. These may be programmable depending on your operating system and software.
5.2. LED Indicator
The LED indicator provides visual feedback on the mouse's status:
- Solid Light: Indicates power on or successful connection.
- Flashing/Cycling Colors: Indicates pairing mode.
- No Light: Mouse is off or in a power-saving state.
6. Maintenance
6.1. Cleaning
To clean your mouse, gently wipe the surface with a soft, dry, or slightly damp cloth. Avoid using harsh chemicals, abrasive cleaners, or excessive moisture, as these can damage the device.
6.2. Battery Replacement
When the mouse's performance degrades or the LED indicator suggests low battery, replace the AA battery by following the steps in Section 4.1. Always use a fresh, high-quality AA battery.
7. Troubleshooting
- Mouse not connecting: Ensure the mouse is turned on and in pairing mode (LED cycling colors). Check your device's Bluetooth settings to ensure Bluetooth is enabled and the mouse is selected. Try forgetting the device on your computer and re-pairing.
- Cursor is non-functional after connection: This can occur if the mouse was turned off and on without re-initiating pairing. Hold down the Bluetooth button on the mouse until the LED cycles colors, then reconnect via your device's Bluetooth settings.
- Lag or intermittent connection: Ensure the mouse is within range of your device. Check for interference from other wireless devices. Replace the battery if it is low.
- Buttons or scroll wheel not responding: Check battery level. Ensure no debris is obstructing the buttons or scroll wheel.
8. Specifications
- Brand: Samsung
- Model Number: EJ-M3400DBEGUS
- Connectivity Technology: Bluetooth 5.0
- Movement Detection Technology: Optical
- DPI: 1000
- Number of Buttons: 5 + Scroll Wheel
- Power Source: 1 x AA Battery
- Item Weight: Approximately 2.72 ounces (77 grams)
- Product Dimensions (LxWxH): Approximately 4.2 x 2.45 x 1.02 inches (10.67 x 6.22 x 2.59 cm)
- Compatible Operating Systems: Linux, Windows, macOS
- Hardware Platform: Laptop
- Date First Available: May 27, 2021
9. Warranty and Support
Your Samsung Bluetooth Slim Mouse is covered by a limited warranty. For specific warranty terms, conditions, and duration, please refer to the warranty card included with your product or visit the official Samsung support website. For technical assistance, troubleshooting, or service inquiries, please contact Samsung customer support.
You can find additional support and product information on the official Samsung Store.