Specification: Item Type: Keyboard Mouse Set Set Model: K620 Connection Method: Wireless Photoelectric Resolution: 2400dpi Features: Support waterproof Keyboard Battery Model: Built in 326588 lithium battery Keyboard Battery Capacity: 3000mAh Keyboard Working Voltage: 5V Mouse Battery Model: Built in JFC504045 lithium battery Mouse Battery Capacity: 800mAh Mouse Working Voltage: 4.2V Package List: 1 x Keyboard 1 x Mouse 1 x English User Manual 1 x USB Charging Cable