Review on The Ultimate Garmin HRM-Tri Heart Rate Monitor: Track Your Performance with Precision by Ikki Martini

Works perfect until battery change, then fails. I've had 2 of these, both with the same story. Bolts, threaded inserts and o-rings are cheap, causing the HRM to leak and fail. Also, the rubber tab on the clasp cuts you into pieces over long distances. I found I had to put a piece of fabric underneath to avoid cutting myself (no, it wasn't too tight). I was meticulous in disassembling and reassembling, even with locks. Good as long as the battery lasts. He also slides in the pool. Needs improvement.