Review on 🏊 H2O Audio Stream 2: Waterproof MP3 Player with Bluetooth & Underwater Headphones - Ideal for Swimming Laps & Watersports, 8GB Storage by Matthew Blustein

My husband swims at the gym 5-7 days a week. He usually stays in the pool for 30 to 60 minutes. He used them every time and never had a single problem. In fact, he didn't even upload any songs there. Instead, he plays his downloaded songs or Pandora on his phone, and the Bluetooth wireless feature can receive them when his phone is near the pool. Says it works great and sounds great.