Special ergonomic design, no need table, which can greatly avoid harm on your palm joint,wrist and muscle for long time using mouse. In addition, it combines the function of wireless mouse with laser pointer creatively. With built-in laser pointer it can be an essential nice assistant of demonstration,presentation and lecture. You can easily control the computer and point to PPT or blackboard. Scrolling function can be controlled simply by your thumb. Suitable for both left and right hand. Some place on the bottom of the mouse is magnetic, which can absorb the USB receiver, avoiding loss of it when not in use. Functions and buttons:left click,right click,scroll wheel,laser pointer,enter,DPI button,power switch. Four group DPI: 400,600,800,1000,adjust the cursor movement speed according to your personal needs. USB interface: plug and play, no software required, ideal for both laptop and desktop computers. Compatible system: Windows,Linux,Unix,Mac OS Powered by: 1 x AAA battery Effective distance: 20 M Working Frequency: 2.4 GHz Mouse size: 11 X 6 X 5 cm Certificate: CE、FCC、ROHS Included: 1 x Y-10L Wireless Trackball Mouse with Laser Pointer, 1 x USB Receiver, 1 x Bag