I have not used the strap but it hooks to the back of the timer.
answered 1 year, 6 months ago
I lifted the flap on the backside, slide in the strap, and dropped the flap. But you have to be careful. I had the strap once on my arm, with the timer, and I was resting after exercising, and I streached out that arm too vigourously, and the timer flew off the strap! I really think it is meant to be worn on a belt.
answered 1 year, 9 months ago