Features:1.Suitable for Tablet PC & Laptop & Desktop computer2.USB PORT、 USB receiver is included3.FOUR GROUP DPI:400、600、800、1004.Battery require:1 x AAAPackage included:1 x Wireless Finger HandHeld USB Trackball Mouse with laser pointer1 x USB receiver1 x Bag1 x USB 2.0 All-in-one Card Reader