USB connection Laser Pointer,powerpoint wireless Laser pointer, slide changer, remote ... .Remote technology 433.92MHz/315MHz2.PC connection USB connection No driver required3.remote control distance over 15m4.suitable for WINDOWS98/2000/ME ... : Windows 98,Se,Me,2000,XP, Mac OS, Linux USB Version : USB 1.1,compatible USB 2.0 Working voltage : 4.5-5.5V ...