... Bag 1 Box 12.Transmitter Functionwireless presenter mouse with laser pointerLaser Pointer:press the button to turn on; ... CR2025 2pcChange the battery when the laser pointer turns dark.5.Dimension and WeightTransmitter: dimension:100*30*9mm weight ... :12.5kg6.ApplicationsTeaching,Lecture,Meeting,Astronomers,Military,SOSLoge Printing or laser marking7.Product Colororder:black, silver, white, red, blue ...