The lightless motor does not hurt the eyes. With comfortable hand feeling. Wireless transmission: The longest transmission distance is about 30 meters. < p>Small and light, easy to carry. This ultra-lightweight mouse is perfect for laptop users. Compatible for Win2000/WinNT4.0/WinXP/Win.NET/Win7/8/ 10, for Mac OS X10.8 system. Ergonomic design, natural hand relaxation, slim and light body.