Hand Held 4D Usb Mini Trackball Mouse

 This Wired Trackball Mouse features dolphin shape design with left right clickers, fit left and right handed users. Its unique shape makes it not need the table support. You can adjust your posture freely, even if you are sitting on sofa or lying down, you can also use it conveniently, especially when you are in the narrow space, like in the car,train or in the plane. Specific: Left button: Common operation Right button: Special function menu Trackball: Thumb roll the trackball to control the cursor Scroll wheel: back and forward Cable Length: Approx. 6.56 ft 2m Resolution DPI: 400 600 800 1000 Compatible with: Windows 98 2000 XP VISTA win 7 Win 10 Linux Unix Mac OS Mouse size: 11 X 6 X 5cm Mouse weight: 100G How to Use: Put your index or middle finger into the hole of this mouse. Control the track ball for moving cursor and press the right and left button with your thumb When using quot;Drag and Go quot; function, press the button in the hole of the mouse that has the same function as the left button of the common mouse Use the left button to lock the screen and then you can control the track ball to roll your screen freely Package Included: 1 X Wired trackball mouse FA amp; Q 1, All the mouse we sell have 3 months , if you had s, please contact the seller(in the package) directly instead of Amazon . 2,If the mouse movement becomes difficult, you may try to used some liquid wax to wiping it. Problem solved