Microsoft Band 3 prototype reveals the wearable that might have been

This was also going to address some of the Band 2’s design issues. The Band 3’s clasp was much thinner, so you’d have an easier time slipping it under a shirt cuff. It appeared to be sturdier, too. And charging was considerably faster — you’d have a full charge in an hour instead of the 1.5 hours of its predecessor. There’s RFID tag support, although that wasn’t working. When you combine this