Note: 1. It's out of power if the mouse cursor moves slowly or stop moving, the indicator which below the DPI button will flash red light, please use the charging cable to recharge it. Its recommended to charge the mouse on computer interface. 2.Please charge the mouse for 2 hours before the first time to use it. The red light beside the scroll wheel will be on while charging, and then goes off when the mouse is fully charged. 3. The mouse will be in sleeping mode after 8 minutes inactivity, you can click any button to wake it up. 4. If connection fails, turn off the mouse, remove and reinsert the dongle, then turn on the mouse try again. About this item Rainbow Lights: Fmouse M303 wirele mouse is a colorful and small LED mouse. You can easily switch up to 10 different light backlit or turn off the light by preing the bottom LED button.It makes your working & life more interesting and cool. Type C Charging: This changing color wirele mouse use a rechargeable battery, it charges through a type C cable. The mouse will auto be in sleeping mode to save battery, and there is a low power indicator, it flashes red light when the battery is low, which help you to charge on time. 4 DPI Level & Comfortable Design: USB computer mouse wirele has 4 DPI levels (800/1600/2400/3600), free to control your own speed of the mouse. Thanks to the design, this mouse fits well for a small or medium hand, prevent any poible wrist pain. Plug & Play: The wirele mouse comes with a small USB nano receiver ( stored at the bottom of the mouse), you can just plug it into your computer and you are ready to go. Universal Compatibility: Works with any computer PC Laptop tablet with USB or type c port, running on Windows XP, Windows Vista, Windows 7/8/10, Mac OS etc. Package Include: 1* Wirele Mouse 1* Type C Charging Cable 1*USB Receiver (under earth the mouse) 1* User Manual