About this item Trackball Mouse Under Your Thumb Control -- Featuring with a trackball movement, no more pushing the mouse around with your wrist and arms, your thumb is what makes this mouse awesome! The thumb manipulation takes a little getting used to, but once you use it for a while it becomes second-nature Smooth&Precise Rollerball Tracking wherever -- With this rollerball mouse, you can employ quite a bit of motion in an extremely limited space, rolling the trackball with your thumb is all it takes and the mouse remains stationary on your busy desk, comfy sofas and lumpy beds etc. 2.4G Dongle+Bluetooth 3-Way Connection -- This mouse come with a 2.4G USB dongle, can also connect by Bluetooth without the dongle, which provides perfect solution if you have more than one computers on your desk. Just 1 “click” to switch from your home PC to work laptop and Tablet easily without having to switch the USB receiver each time Ergono Comfort Design for Natural Grip -- The shape of mouse is comfortable, which ergonoally fits your palm perfectly. It’s a great option if you need to be on the computer frequently for long periods of time, once you start using it, you will never go back to a regular mouse or trackpad Rechargeable Mouse with Adjustable Light -- Equipped with build-in rechargeable y, so no more worries about replacing the ies at the most inopportune time, you can recharge the mouse easily with the Type-c cable included in package. There is a RGB light strip on the top of mouse which is a fun addition to this Mouse