Review on BASN Active Noise Canceling IEM Headphones Bluetooth Headphones Deep Bass Wireless Headphones with MMCX Connector – Metalen PRO Gray | Perfect for Workout, Running, and Gym by Dale Sundet

This iEM is much more expensive than its price. The build quality is excellent, the included accessories are all useful. The Bluetooth band sounds good, but I don't prefer wearing the band around my neck. I usually switch to the supplied cable and use it wired. The sound is balanced, the bass is fast and thick, the mids are clear and thick, and the highs are smooth and detailed. No hiss at high altitude. None of the KZ or TRN IEMs sound that good, I've tried everything in the under $150 price range. BASN Metalen is the best! I switched to wider bore tips and the soundstage is even wider.