【ERGONOMIC TRACKBALL MOUSE】 With the smooth and precision trackball, no need to move your arm to control the cursor, your thumb will do it instead. It will reduce fatigue and strain for your wrist and arm. | 【2.4G WIRELESS & BLUETOOTH CONNECTION】This ergonomic wireless trackball mouse has dual connection modes wireless 2.4G and BT 4.0 , you can connect up to 3 different devices at the same time, switch freely between Android, tablet and Mac with just one button.(USB Nano Receiver is located in the mouse bottom) | 【WIDE COMPATIBILITY】2.4GHz mode works with laptop, desktop or any device with USB port, plug and play. Bluetooth mode works with Windows / Android / MAC OS system, won't occupy any USB port. | 【RECHARGEABLE WITH USB-C PORT】With built-in 600mAh lithium battery, the Bluetooth trackball mouse can last 1 month per one full recharge, no need to replace battery. And please remember to turn it off if you do not use it for a long time. | 【3 ADJUSTABLE DPI】3 adjustable DPI level 1000/1600/2400, you can change the cursor sensitivity depending on your activity. Fast response, smooth tracking, precise movement.