... ) Page up/down function (3) Radio Frequency: 315/433MHz (4) Battery:2 pcs AAA Green Light ... Mini USB Wireless Presenter * Page up/down function* Radio Frequency: ... Bag 1 Box 12.Main function Green Laser pointer Page up/down function Build-in USB ... , silverorder:black, silver, white, red, blue, green, yellow etc..6.ApplicationsTeaching & Presentation,Lecture,Astronomers ( ...