Feature: 1. There are 4 buttons, including scroll wheel, page-down and page-back buttons for easy operation 2. The product can realize 2.4GHz wireless transmission, up to 10 meters working distance 3. 2.4GHz wireless mouse is lightweight and portable, very easy for you to carry and store 4. There is a power switch to save power, environmentally friendly, useful and practical 5. Wireless optical mouse come with USB interface, DPI up to 2000, bring a great using experience Specification: Item Type: Wireless mouse Material: ABS Battery: 2 x AAA batteries (not included) DPI: 2000 Mouse Type: Wireless optical mouse Interface: USB Working Distance: Approx. 10meter / 32.8ft. Package List: 1 x Mouse1 x USB Receiver Note: This mouse does not need to manually press the switch, it will automatically turn off, such as the phone lock screen, when not used for a period of time, it will automatically lock, click again to wake up.