Puck JS - External Switches & LED's For Reaction Lights (Ref Medical Fitness)

It’s my understanding that only puck.js is happy with Coin cells for this type of application? Is that right?

The others can often work off coin cells too, but the Puck actually has a battery holder and is definitely set up for it out the box.

And yes, the Puck Lites are now actually here, but it'll be a week or two before we get them in the shop I'm afraid.