USB connection Laser Pointer,powerpoint wireless Laser pointer, slide changer, remote presenter , Optional memory ,Custom logo Item Name:PP-800 Laser PointerItem ... and high quality painting Specifications1.laser pointer, slide changer 2.remote presenter 3.Optional memory 4.Custom ... Linux USB Version : USB 1.1,compatible USB 2.0 Working voltage : 4.5-5.5V Presentation Laser Pointer with USB connection