●This small trackball mouse can reduce wrist strain with easy thumb operation ●The shape is similar to a normal mouse and is recommended for those who first use trackball mouse. The small size makes it easy to hold for people with small hands ●The connection method uses Bluetooth connection. You can connect to 3 devices with Bluetooth, and you can switch between the connected devices by pressing the button on the back ●Equipped with 5 buttons for comfortable operation, left and right buttons, and back forward buttons are silent buttons. Comes with a convenient carrying pouch