Lightro is a glow in the dark football illuminated automatically when you start playing, and automatically turns off when you stop. It will stay illuminated for a full minute after the last impact, so you have plenty of time to find any missed catches. You won't even think about an on off switch, it'll just work. As it should be! Batteries Included. No assembly required. Lightro comes packed with 3x LR44 batteries pre-installed, so Lightro is ready to play right out of the box.