Function 1: Portable mouse for travel and meetings Function 2: Ergonomic mouse Function 3: Used for computers and laptops Feature: Mini mouse Acceleration: 30G Movement speed, IPS: 100 Sensor model: Pixart 3311 (12000 DPI|300 IPS|35G) Operation mode: photoelectric type Power supply type: rechargeable Number of buttons: 3 Number of rollers: 1 Hand direction: Both hands Packaging: Yes Style: 3D, mini Resolution: 1200 Interface type: USB Type: 2.4Ghz Sensor model: Pixart 3311 Tracking : optical sensor Power supply: Redirectable lithium battery size: 8.2 x 2.6 x 2.2 cm Material: abs colour: Black Package contents: 1 x mouse 1 x data cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.