(1)Wireless Green Laser Pointer (2)Page Up/Down( ... Green Laser Pointer1.COMPONENT Transmitter 1 Receiver 1 Battery 2 Manual 1 Bag 1 Box 1 2.TRANSMITTER FUNCTION Laser Pointer ... 4.BATTERYLR1 2PCSChange the battery when the laser pointer turns dark. 5.MEASUREMENT AND WEIGHT ... silverOrder:black, silver, white, red, blue, green, yellow etc.. 7.ApplicationsTeaching & Presentation,Lecture,Astronomers ...