... and play, doesnot need out meet power.Product List1 receiver, 1 control box, 2 signal pens, 1 data ... PC software, 1 sit at the end of receiver, one volume of double-sided adhesive.ApplicationIt can be used ... in electricity teaching and remote teaching of junior college and technical secondary school, high school ... work temperature: 0~5. the persist work time of signal pen: more than 80 hours (5V ...