I bought one of the wireless Schwinn's by mistake, but discovered the wireless unit was too thick to fit between the spokes and the fork. Maybe it'll fit most other bikes, but not mine.

Meanwhile, I've been using a wired Schwinn unit. Only drawback on it is that I discovered the hard way that when the battery runs down, it loses all settings, including the odometer. Which of course, makes the odometer function pointless. (Odometer is different from the trip meter).