USB connection Laser Pointer,powerpoint wireless Laser pointer, slide changer, remote presenter , Optional memory ,Custom logo ... .PC connection USB connection No driver required3.remote control distance over 15m4.suitable for WINDOWS98 ... painting Specifications1.laser pointer, slide changer 2.remote presenter 3.Optional memory 4.Custom logo,CE ... : 4.5-5.5V Presentation Laser Pointer with USB connection