Model No.: W189 100% brand new and high quality Color: Black, White; Two-color simple classic does not fall behind Battery: 1*AA（not included）smart power-saving mode to enjoy wireless fun System Requirements: Windows 10 or later, Windows 8, Windows 7, Mac OS X 10.8 or later, Chrome OS 2.4G wireless transmission, zero delay Strong anti-interference ability, wireless connection range up to 10 meters (33 feet) 3D button wireless mouse, symmetrical ergonomic design suitable for left and right hand use, feel comfortable, fitting hand type, ideal for durable office! USB micro receiver 1200DPI Super sensitivity, plug and play, advanced optical tracking technology for quick click and response progress web page preview is easy and smooth.