I think the loop very well when as the battery life would not. After 1.5 to 2 days, he needs to be recharged. And I do not ship times the RF transmitter. The functions are otherwise class. Shortening of the bands I feel personally as completely unproblematic. Then you have a great bracelet that keeps well and looks great. + Features + Synchronization + Design + Bracelet - Time to recharge after about 2 days