Pool notes: why waterproof Bluetooth dies mid-lap
Lap swimming with “waterproof Bluetooth” usually disappoints once your head is under — water between phone and ears kills the link. That physics hasn’t changed.
What actually works in practice falls into three lanes (no product pitch): 1) Onboard MP3 on the headset — fixed playlist, no deck box. 2) Live stream — phone stays dry on a poolside transmitter; underwater hop is usually FM to waterproof receivers. 3) Coach voice mid-set — that’s a communicator workflow, not a music headset.
Transmitter tips that help any setup: antenna fully extended, box elevated in an open deck spot, matching channel. Just a recreational lane note — not a product review.