How to Use: Plug and Play Specification: Item Type: Wireless Mouse Material: ABS Wireless Distance: Approx. 10m/11yd Rated Voltage/current: 3.7V / 100mA Number of Keys: 6 Keys (4 buttons, 1 scroll wheel, 1 dpi) Optical Resolution: 800dpi/ 1600dpi/ 2400dpi Color: Black Work: Optoelectronics Button Life: 8 Million Times Built-in Lithium Battery: 500mah (rechargeable battery) Charging Cable Length: Approx. 80cm/31.5in (manual measurement allows error) System Requirements: For Win 98, for Win Me, for Win 2000, for Win XP, for Win Vista, for Win 7, for Win 8, for Win 10, for OS X Package List: 1 x Wireless Mouse 1 x USB Receiver 1 x USB Charging Cable Note: Manual Measurement Allows ErrorNote: This Mouse Does Not Need Batteries Now. There is a Battery Inside the Mouse! You Can Use the Usb Cable to Charge! No Need to Worry About Buying Batteries Again! Built in Battery Delivery