Cordless Mouse - 2.4GHz Wireless ensures reliable connection with a long working distance of up to 20m and 250Hz super high speed rate of return, which eliminates delays, dropouts and interference. Ergonomic Mouse - GXUV surface treatment technology and comfortable cherry wheel provide all-day comfort for work and entertainment, with quiet click and slim portable size, perfect for travel as well. Power Saving Design - The wireless optical mouse will be in sleep mode after 5 minutes without operation, click left or right button to wake it up when you want it to work again, so the on and off switch is not required, also eliminates the need to change ies. Powered by 1 AA y. USB Connection - A USB nano receiver (stored in the back of the mouse) conveniently slots into your computer's USB port. Plug and play directly. Compatible with almost all USB-enab computers laptops. Pls Note: this mouse will NOT compatible with Macbook Pro or other devices which only have Type C ports, it will need an adapter to work Service for You - 30 days money-back & 6-months guaranty. if any questions with our product, please don't hesitate to get a after-sales service, we will response within 24 hours.