ERGONOMIC TRACKBALL MOUSE: With its precision trackball, you can move the cursor without moving your arm. Your thumb controls the cursor, effectively reducing wrist and arm fatigue. BLUETOOTH & 2.4G WIRELESS CONNECTION: Features dual connection modes (BT 4.0 and 2.4G wireless with a USB Nano receiver stored in the mouse base). Connect up to 3 devices simultaneously and switch freely between Android, and with just one button. RECHARGEABLE WITH USB-C PORT: Built-in 600mAh lithium battery eliminates the need for battery replacements. Enjoy long-lasting use on a single charge. Remember to turn it off when not in use for extended periods. 3 ADJUSTABLE DPI: Choose from 3 DPI levels (1000/1600/2400) to adjust cursor sensitivity based on your activity, ensuring a responsive and accurate user experience. WIDE COMPATIBILITY: Universally compatible with Windows, Android, OS PC Laptop Desktop, etc. Bluetooth mode works with Windows/Android/OS systems without occupying a USB port. 2.4GHz mode works with any device with a USB port; simply plug in the USB receiver. 1. Precision Trackball: Move the cursor effortlessly without hand fatigue. 2. 2.4G USB Wireless and Bluetooth Dual Mode. 3. Ergonomic Design. 4. High Sensitivity with 3 Levels. 5. Rechargeable with USB C Port. 6. Connects up to 3 Devices Simultaneously. Specifications: Working Distance: 10m DPI Levels: 1000/1600/2400 Click Lifespan: Over 3 million Lithium Battery Capacity: 600mA Material: Plastic Color: Black Package Contents: 1 x Trackball Mouse