Specifications:1. Brand: Wowpen-joy2. Color: black3. Working mode: photoelectric4. Interface type: USB5. Key number: 56. Optical resolution: 1000dpi7. Human engineering: YesFeatures:1. Let your wrist, fingers get a new comfortable experience2. Eliminate the occupational bowl tube syndromePackage included:1 x Mouse1 x Wireless receiver1 x Power cable