Ready for all your workout and travel needs, the TFZ B.V2 wireless IEM boasts Bluetooth 5.0 lossless transmission and an IPX5 waterproof rating. It doesn’t skimp on sound, either: each channel features a balanced armature driver, a rarity among fully wireless IEMs. The built-in battery gives you up to 15 hours of playback and can be charged in an hour. The IEM also comes with a high-definition microphone for hands-free calls and controlling your phone's voice assistant.