HXSJ M40 4 Key 2.4G Colorful Wireless Silent Mouse Main Features 1. 2.4G wireless transmission technology 2. 10m wireless receiving distance 3. Three gear DPI adjustment design 4. Quiet and elegant office wireless mouse 5. Colorful, cooler 6. High resolution: fluid motion 1600 DPI high resolution 7. Fashion slim design: slim design, fashionable appearance, easy to carry Specifications 1.Color: black, silver. 2. Material: ABS 3. Key lifetime: 5 million times 4. Wireless distance: 10m 5. Work: photoelectric 6. Battery capacity: 500mAh (rechargeable lithium battery) 7. Length of charging cable: 25cm 8. Project type: ergonomic optical mouse 9. Resolution: 80012001600 (the default is 1200dpi) 10. Operation mode: photoelectric type 11. Rated voltage current: 3.7v18mA 12. Power type: Rechargeable (charging time 2 hours, working time 150 hours) 13. Button: 2 buttons and 1 round (medium mutton) and DPI key 14. System requirements: Windows98 Me 2000 XP Vista Win7 Win8 10 Vista Mac OS Packing list: 1. 1 x 2.4G wireless mouse 2. 1 x USB receiver 3. 1 USB charging cable (25cm) Installation and operation steps: 1. Remove the wireless mouse from the box. 2. Remove the mini receiver installed at the bottom of the mouse and plug it into the USB interface of the computer. 3. This product is built-in lithium battery. You just need to set the bottom switch to the ON position. Be Careful: The charging cable is included in the package. When the cursor movement is delayed, plug the charging cable into the front interface of the mouse for charging. Please try not to use when charging.