Lenovo Thinkplus High-Precision Wireless Mouse Ergonomic Design Gaming Office Mouse 1. Number of buttons: 5 2. Built-in 380mAh lithium battery, can be used continuously for about 45 hours, configured with USB-C interface, charging at any time 3. 3-speed DPI adjustable, 800DPI1200DPI1600DPI 4. 5 keys and 3D non-slip scroll wheel, the left side of the configuration of the practical forward and backward keys for easy operation, for efficient office provides convenient 5. Non-slip pleated skirt design on both sides, ergonomic palm fit to say goodbye to the fatigue of long-term use, comfortable and stable grip. 6. The left and right main buttons and the scroll wheel centre button are designed to be whisper-quiet, so that you can use them in a quiet environment such as a conference room without disturbing others. 7. High-precision optical engine for precise positioning of various desktops. 8. 2.4G wireless connection, 10 metres range of arbitrary connection, plug and play, the operation of the unrestrained 9. Weight: 115g 10. size: 102x58x38mm Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.