Brand Name: xiaomi Origin: CN(Origin) Type: 2.4Ghz Wireless Certification: NONE Number of Rollers: 1 Gross Weight: 85g DPI: 1000 Package: Yes Number of Buttons: 2 Operation Mode: Trackball Style: Trackballs Power Type: Battery Time to market: Nov-13 Model Number: Xiaomi Wireless mouse 2 Hand Orientation: Right Interface Type: USB