2.4 GHz wireless communication, available within 9 meters, with strong anti-interference capability More convenient keyboard and mouse integration and faster operation Optical sensor truck ball controller, precise, frequency and position Flat and comfortable button design Muti Language Party Roller technology, random rotation between two directions Intelligent power indicator Easy to carry travel or home HTPC and computer applications Ultra thin disc, multimedia key, fixed-point trackball, comfortable and reliable, simple structure The classic key position is 78, 20 multimedia keys are installed, and a trackball mouse with a resolution of up to 1000 DPI is built, The left and right mouse buttons are on the top of the keyboard, making it easy for users to use the remote control. In order to make users easily on the desktop, the lower right corner of the keyboard also has the left, right and wheel buttons. Product parameters: Connection: 2.4G wireless Size: 26 x 12 x 2.5 cm Product weight: 210g Weight after packaging: 300g Mouse DPI: 1200 p> Tracking method: mouse tracking ball Power supply: 2 AA batteries Color: black Button life: 8 million times System requirements: Windows 2000, Me, XP, Vista, Win 7, Linux, Android and Mac or higher