wireless presenter with laser pointer (1)Page up/down (2)USB flash memory: ... 4GB/32GB4.Battery CR2025* 2pcChange the battery when the laser pointer turns dark. 5.Dimension and WeightTransmitter: dimension:100*30 ... ,Astronomers,Military,SOSLoge Printing or laser marking 7.Product Colororder:black, silver, white, red, blue, green, yellow etc. 8 ... of purchase. usb rc wireless presenter with laser pointer