Dell Premier Rechargeable Wireless Mouse

MS7421W

User's Guide

Notes, Caution, and Warnings

NOTE: A NOTE indicates important information that helps you make better use of your computer.

CAUTION: A CAUTION indicates potential damage to hardware or loss of data if instructions are not followed.

WARNING: A WARNING indicates a potential for property damage, personal injury, or death.

Copyright © 2020 Dell Inc. All rights reserved. Dell, EMC, and other trademarks are trademarks of Dell Inc. or its subsidiaries. Other trademarks may be trademarks of their respective owners.

2020 - 12 Rev. A00

What's in the box

The box contains the following items:

• 1. Wireless mouse
• 2. Documents: Includes Warranty, Safety, Environmental, and Regulatory Information, and Quick Start Guide.
• 3. Dell Universal Dongle
• 4. USB-C cable for recharging

Features

Top view

The top view of the mouse shows the following components:

• 1. Left button
• 2. Right button
• 3. Scroll wheel
• 4. Forward button
• 5. Backward button
• 6. Connection-mode lights:
  • White LED blinking: device is not connected to computer
  • LED lighting solid white: device is connected to computer
• 7. Connection-mode button
• 8. Charging/low battery lights:
  • White LED breathing: battery in charging
  • Amber LED pulsing: device battery is low, need to recharge
• 9. PPID/Regulatory labels

Bottom view

The bottom view of the mouse shows:

• 1. Optical sensor
• 2. Power switch

Shortcut gestures

Scroll and Tilt

Supports 4-way scroll.

Forward function

Press the front button on the side.

Backward function

Press the rear button on the side.

Dell Peripheral Manager

Dell Peripheral Manager software enables you to perform the following actions:

• Assign program shortcuts to device programmable buttons or keys through the Action tab.
• View device information such as firmware version and battery status through the Info tab.
• Upgrade the latest firmware updates on your devices.
• Pair additional devices through the Dell Universal Dongle or directly to your computer through Bluetooth.
• Change device DPI setting by selecting Device Settings > DPI Setting at the down-right corner of the window.
• Swap mouse button by selecting Windows Settings > Primary Mouse Button at the down-right corner of the window.

For more information, see the Dell Peripheral Manager User's Guide on the product page at www.dell.com/support.

Setting up your wireless mouse

1. Locate the slot on the side of the mouse cover. Using your fingertip, pry open the cover. [Diagram showing prying open the mouse cover]
2. Remove the Dell Universal Dongle from its compartment. [Diagram showing dongle removal]
3. Replace the mouse cover. [Diagram showing cover replacement]
4. Slide the power switch down to turn on the wireless mouse. [Diagram showing power switch operation]

NOTE: Ensure that the distance between your computer and mouse is within ten meters.

Pairing your wireless mouse

Your Dell wireless mouse can be paired via the Dell Universal Dongle or direct Bluetooth connection. You can pair and switch between a laptop, desktop, and a compatible mobile device.

Pairing with the Dell Universal Dongle

NOTE: You can connect a device to your wireless mouse using the Dell Peripheral Manager.

1. Plug the Dell Universal Dongle into the USB port on your computer. NOTE: The Dell Universal Dongle is pre-paired with your wireless mouse in the factory. [Diagram showing dongle plugged into laptop and desktop USB ports]
2. The connection-mode light (indicator 18) on the wireless mouse turns on to indicate the Dell Universal pairing, and then turns off. [Diagram showing mouse with connection-mode light active]
3. The wireless mouse is paired with your Dell Universal Dongle. [Diagram showing laptop, dongle, and mouse connected]

Pairing your wireless mouse using Bluetooth

You can connect up to two devices with your wireless mouse using Bluetooth.

NOTE: Before pairing your wireless mouse using Bluetooth, ensure that you unpair the inactive devices on your computer, and update the Bluetooth driver to the latest version on your computer. For more information, see Drivers & Downloads at https://www.dell.com/support.

1. Press the connection-mode button twice on your wireless mouse (within 3 seconds) until the connection-mode light (indicator 2) turns on indicating that the second Bluetooth connection is selected. [Diagram showing button press and light indicator]
2. The connection-mode light (indicator 2) blinks for 3 minutes, indicating your wireless mouse is in the pairing mode. [Diagram showing mouse in pairing mode]
3. Pair your wireless mouse with your Bluetooth-enabled computer.
   • Swift Pair:
     • In Windows Search, type Bluetooth.
     • Click Bluetooth and other devices settings. The Settings window appears.
     • Ensure that the “Show notifications to connect using Swift Pair” box is checked. [Screenshot of Windows Swift Pair notification setting]
     • Ensure that the Bluetooth is turned on.
     • Place your wireless mouse near your computer. The "New Dell Mouse found" window appears. [Screenshot of "New Dell Mouse found" window]
     • Click Connect and confirm the pairing process on both wireless mouse and your computer.
   • Add Device:
     • In Windows Search, type Bluetooth.
     • Click Bluetooth and other devices settings. The Settings window appears.
     • Ensure that the Bluetooth is turned on.
     • Click Add Bluetooth or other device > Bluetooth.
     • From the list of available devices, click Dell Mouse. [Screenshot of "Add a device" window]

NOTE: If Mouse MS7421W is not listed, ensure that the pairing mode is enabled on the wireless mouse.

4. Confirm that both the wireless mouse and the device are paired. The second Bluetooth connection light turns solid white for 3 seconds to confirm the connection is established, and then turns off. After the wireless mouse and a device are paired, they connect automatically when Bluetooth is enabled and they are within Bluetooth range. [Diagram showing paired mouse and device]

Pairing device three using Bluetooth

NOTE: You can connect a third device to your wireless mouse using Bluetooth.

NOTE: Before pairing your wireless mouse using Bluetooth, ensure that you unpair the inactive devices on your computer, and update the Bluetooth driver to the latest version on your computer. For more information, see Drivers & Downloads at https://www.dell.com/support.

1. Press the connection-mode button twice on your wireless mouse (within 3 seconds) until the connection-mode light (indicator 3) turns on indicating that the third Bluetooth connection is selected. [Diagram showing button press and light indicator]
2. The third Bluetooth connection light (indicator 3) starts blinking to confirm the pairing mode is enabled. [Diagram showing mouse in pairing mode]
3. Pair your wireless mouse with your Bluetooth-enabled computer.
   • Swift Pair:
     • In Windows Search, type Bluetooth.
     • Click Bluetooth and other devices settings. The Settings window appears.
     • Ensure that the “Show notifications to connect using Swift Pair” box is checked.
     • Ensure that the Bluetooth is turned on.
     • Place your wireless mouse near your computer. The "New Dell Mouse found" window appears. [Screenshot of "New Dell Mouse found" window]
     • Click Connect and confirm the pairing process on both wireless mouse and your computer.
   • Add Device:
     • In Windows Search, type Bluetooth.
     • Click Bluetooth and other devices settings. The Settings window appears.
     • Ensure that the Bluetooth is turned on.
     • Click Add Bluetooth or other device > Bluetooth.
     • From the list of available devices, click Dell Mouse. [Screenshot of "Add a device" window]

NOTE: If Mouse MS7421W is not listed, ensure that the pairing mode is enabled on the wireless mouse.

4. The third Bluetooth connection light turns solid white for 3 seconds to confirm the connection is established then dims off. After the wireless mouse and a device are paired, they connect automatically when Bluetooth is enabled and they are within Bluetooth range. [Diagram showing paired mouse and device]

Charging your wireless mouse

1. When the amber LED of the mouse blinks, you need to charge your wireless mouse. [Diagram showing amber LED blinking]
2. Connect the USB-C cable to your wireless mouse. [Diagram showing USB-C cable connection to mouse]
3. Connect the USB-C cable to your laptop or desktop computer. [Diagram showing USB-C cable connected to computer]
4. Battery charging: The battery LED will be breathing white to indicate charging and will turn solid white for 10 seconds to indicate charge completed. [Diagram showing charging status lights]

Specifications

General

• Mouse model number: MS7421W
• Connection type: 2.4 GHz Wireless & Bluetooth dual mode technology
• Supported operating systems (2.4 GHz):
  • Windows 10/8/7/XP
  • Server 2008/Server 2012
  • Linux 6.x, Ubuntu, Free DOS
  • Chrome and Android
  • MAC OS
• Supported operating systems (Bluetooth):
  • Windows 10/8
  • Chrome and Android
  • MAC OS

Electrical

• From USB host (Operating): 5 V
• Battery Voltage (Operating): 3.6 V to 4.2 V
• Battery Life: Approximately 6 months
• Battery Requirements: Li-ion polymer Battery

Physical characteristics

• Weight: 80.20 g +/-3 g (with dongle)
• Dimensions:
  • Length: 101.76 mm (4.0 in.)
  • Width: 61.88 mm (2.44 in.)
  • Height: 35.44 mm (1.40 in.)

Environmental

• Temperature:
  • Operating: 0°C to 40°C (32°F to 104°F)
  • Storage: -40°C to 65°C (-40°F to 149°F)
• Storage humidity: 95% maximum relative humidity; non-condensing

2.4 GHz/BLE Wireless

• Radio Transmission: Bi-directional communication (Transceiver)
• Range: Up to 10 meters

Troubleshooting

Unable to use the wireless mouse

Possible causes

The white LED indicator at top of the wireless mouse does not light up when the wireless mouse is turned on.

Possible solutions

1. Check the battery level. This mouse uses a rechargeable battery, please ensure that the battery is fully charged.
2. Turn the wireless mouse off, and then turn on again. Check if the battery status light amber pulsing for 5 sec then dim off, flashing amber, indicating that the battery power is low. If the battery is fully depleted, the battery-status light will not turn on.
3. Ensure that the Dell Universal Dongle is directly connected to your computer. Avoid using the port replicators, USB hubs, and so on.
4. Change the USB port. Insert the Dell Universal Dongle into another USB port on your computer.

Unable to pair the wireless mouse to the computer using Bluetooth

Possible causes

The Bluetooth icon on the computer does not light up when connecting the wireless mouse to the computer.

Possible solutions

1. Check the battery level. This wireless mouse uses a rechargeable battery, please ensure that the battery is fully charged.
2. Turn the wireless mouse off, and then turn it on again. Check if the battery-status light is flashing amber, indicating that the battery power is low. If the battery is fully depleted, the battery-status light will not turn on.
3. Restart your computer.
4. Check the operating system is Windows 10/Windows 8/ Chrome/Android.
5. Ensure that the wireless mouse is set to Bluetooth Low Energy (BLE) mode in your computer. For more information, see the documentation that came with your computer.
6. Turn off then on, and then turn on the Bluetooth. Low Energy (BLE) mode in your computer. For more information, see the documentation that came with your computer.

Mouse pointer does not move

Possible causes

The wireless mouse pointer is not responding

Possible solutions

1. Check the battery level. This wireless mouse uses a rechargeable battery, please ensure that the battery is fully charged.
2. Turn the wireless mouse off, and then turn it on. Check if the battery-status light is flashing amber ten times, indicating that the battery power is low. If the battery is fully depleted, the battery-status light will not turn on.
3. Restart your computer.

Left/right buttons does not work

Possible causes

No response when the left or right mouse button is pressed

Possible solutions

1. Check the battery level. This wireless mouse uses a rechargeable battery, please ensure that the battery is fully charged.
2. Turn the wireless mouse off, and then turn it on. Check if the battery-status light is flashing amber ten times, indicating that the battery power is low. If the battery is fully depleted, the battery-status light will not turn on.
3. Restart your computer.

Unable to pair the wireless mouse with the computer

Possible causes

Wireless pairing error message is received while pairing the wireless mouse with the computer

Possible solutions

1. Check the battery level. This wireless mouse uses a rechargeable battery, please ensure that the battery is fully charged.
2. Turn the wireless mouse off, and then turn it on again. Check if the battery-status light is flashing amber ten times, indicating that the battery power is low. If the battery is fully depleted, the battery-status light will not turn on.
3. Restart your computer.

Wireless connection is lost

Possible causes

Previously paired mouse no longer works on the computer

Possible solutions

1. Ensure that the Dell Universal Dongle is connected directly to your computer. Avoid using the port replicators, USB hubs, and so on.
2. Change the USB port. Insert the Dell Universal Dongle into another USB port on your computer.

Statutory information

Warranty

Limited warranty and return policies

Dell-branded products carry three-year limited hardware warranty. If purchased together with a Dell system, it will follow the system warranty.

For U.S. customers:

This purchase and your use of this product are subject to Dell's end user agreement, which you can find at Dell.com/terms. This document contains a binding arbitration clause.

For European, Middle Eastern and African customers:

Dell-branded products that are sold and used are subject to applicable national consumer legal rights, the terms of any retailer sale agreement that you have entered into (which will apply between you and the retailer) and Dell's end user contract terms. Dell may also provide an additional hardware warranty—full details of the Dell end user contract and warranty terms can be found by going to Dell.com, selecting your country from the list at the bottom of the “home” page and then clicking the “terms and conditions” link for the end user terms or the “support” link for the warranty terms.

For non-U.S. customers:

Dell-branded products that are sold and used are subject to applicable national consumer legal rights, the terms of any retailer sale agreement that you have entered into (which will apply between you and the retailer) and Dell's warranty terms. Dell may also provide an additional hardware warranty—full details of Dell's warranty terms can be found by going to Dell.com, selecting your country from the list at the bottom of the “home” page and then clicking the “terms and conditions” link or the “support” link for the warranty terms.