无线Trackball老鼠遥控+USB Pres

Wireless Trackball Mouse Remote Control + USB Presenter 1. Easily control the pace of your presentation Advanced radio frequency(RF) technology that works through walls and the controlling distance is up to 10-meters/30-feet away, so you never have to stand at beside of your computer. 2. Multifunctional presenter It combines the functions of a laser pointer, and optical mouse and keyboard hot keys etc. If you need flash memory, the receiver supports to be added built-in flash memory. (No memory /128M/256M/512M/1G/2G) 3. Easy to use It is USB plug-and-play. No driver required. Just plug the receiver into the USB port on a PC andit works within seconds. 4. Save power design The device will go to sleep mode if there is no any operation for about 30 seconds.It will wake up if any key is pressed. We also have other models laser pointer pens