... Resolution Size: 90 x 46 x 30mm 3 buttons mini wireless optical mouse, 27MHz Hight technology Key Specifications/Special Features:Size: 90 ... x 46 x 30mm 3 buttons mini wireless optical mouse, 27MHz hight technology, 800dpi high resolution Convenient scroll wheel, ... within 1.5 meters radius of 360 degrees Automatic sleeping and wake-up saving power function Interface: USB, U+P ...