Features: Ultra-silent click, quieter and easier to click, make you concentrate on your work without disturbing others bedside you. Adopt optical tech, convenient to move, more accurate tracking to realize quick reaction. Chargeable,Comes with USB charging cable, effectively alleviates the waste of resources caused by using batteries, saves users' cost of use. 3-speed sensitivity adjustment, 3 files 800-1200-1600DPI, suitable for all areas of business office. Technical Parameters: 2.4G Wireless Transmission Technology 10M wireless receiving distance Third gear DPI adjustment design Quiet and elegant office wireless mouse High resolution: Max 1600 DPI high resolution for fluid motion Fashionable slim design: Slim design for sleek look and portable use Specification: Material: ABS Key life: 5 million times Wireless distance: 10m Work: Photoelectricity Battery capacity:500mAh（Chargeable battery） Charging cable length: 25cm Project Type: Ergonomics Optical Mouse Resolution: 800,1200,1600.(1200dpi Default) Operation Mode:Opto-electronic Rated voltage / current: 3.7V / 18mA Power Type:Rechargeable（Charging time 2h,Working time 150h） Type:2.4Ghz Wireless mouse Buttons: 2 Buttons and 1 Round (Middle Mutton) and Dpi key System requirements: Win 98/Me/2000/XP/Vista/7/8 /10/Vista Macs OS or latest. Product weight:67g Item size: 11.2 *5.8 * 2.5cm Packing weight: 102g Package Size:12.2 * 8.3* 4.3cm Installation and use steps: 1. Remove the wireless mouse from the box. 2. Remove the mini receiver installed in the bottom of the mouse, insert the computer's USB interface, Free code, plug and play. 3.This product is a built-in battery. You only need to set the bottom switch to the ON position. A charging cable is included in the package. When the cursor movement delay occurs, please insert the charging cable into the front end interface of the mouse to charge. Please try not to use it while charging! Include: 1 x 2.4 G Wireless Mouse 1 x USB Charging Cable