DH picked up some of these at Interbike years ago. I thought they were pretty darn cool. His just glowed red, no messages. I don't know if he got an early prototype, if they were basic models they gave as swag, or if his technophobia kept him from programming them .

Corsair, they turn on and off by themselves!! Some special magnetic process that I am sure I would understand if I took the time to learn about it .