... :the pen body use rubber and high quality painting Specifications1.laser pointer, slide changer 2.remote presenter 3.Optional memory 4.Custom ... logo,CE Color: black/silver/blueFunction: 1,laser pointer; 2,page up/down; 3, built-in memory optional4, play ... ,compatible USB 2.0 Working voltage : 4.5-5.5V Presentation Laser Pointer with USB connection