... Black Screen Wireless Presenter Laser Pointer 1.Product compositionTransmitter 1 Receiver 1 Battery 2 Manual 1 Bag 1 Box 1 2 ... turns dark. 5.MEASUREMENT AND WEIGHT Transmitter: dimension:9.7*2.7*1.8cmReceiver: dimension:5.2*2.3*1.5cmBox : ... :blackorder:black, silver, white, red, blue, green, yellow etc. 7.ApplicationsTeaching, lectures, exploration, and tourism useLogo printing or laser markingThe ...