I find that hard to believe, at least a full time monitoring wrist band. Good workers like metrics, but of course, every metric can be gamed. They aren't as valuable as you might think they are.
If I am ordered to wear a monitoring wristband, I will naturally suspect that my manager is an idiot. The first test would likely to be to pair up with another worker and swap wristbands. Further along, try putting both wristbands on one wrist for short periods of time, such as when someone is using the bathroom.
I'd probably also try bracelets with magnets on them and wrapping the wristband in foil. If they are universally hated by the workers, spraying them all with histamine before the shift starts would result in visible skin irritation under the bands, and a video of said irritation posted to social media might get them withdrawn for a while.
Good workers like to be respected and valued as human beings. Treat them like fungible cogs at your own peril.