How is this LED pen activated? Does it have an on switch at the tip? The end? Does it have a button which needs to be depressed by your finger to activate or stay activated?
Is there any IR pen that has been shown to work well that is ready made to buy? Or are there any kind of LED pens which use a tip switch to activate that I could simply replace the LED with an IR LED? I'm trying to find something as close to ready to buy without needing to hardware batteries into an Expo marker or similar.