Built-in rechargeable battery with a charging cable.No more need for extra AA battery. No need to replace the battery, which is convenient and reduces the environmental pollution of the battery.^ Special soundless design for the right and left buttons, Quieter and Easier to click, make you concentrate on your work without disturbing others .^ This mouse will be in sleep mode in 8 minutes of inactivity. Press any button to wake it up.Smart auto-sleep mode saves power .^ Well compatible with WindowsXP/7/8/10, Vista and Linux etc. Fits for desktop, laptop, PC, Macbook and other devices(this mouse is not compatible with macbook pro or other laptops which only have type-c ports).^ Passed 5,000,000 times keystroke test to guarantee extra durability. 2.4GHz wireless technology and professional chip ensure longer working distance, reaching up to 33ft10m.^