Had difficulty trying to figure out how it actually went on the watch. The way I had it at first, was really wrong. Did not make contact with the arm, gave false information, and kept getting loose on my wrist. I contacted the Healthwatch team and they recommended at youtube video for instruction. Once I followed the instructions, it worked perfectly and did not come loose. I love the band. Easy to put on, and stays in place, and it is really comfortable.