PSB M4U TW1 True Wireless Earphones Black (Open Box) iem cables Intensive research and many years

Intensive research and many years of testing

With their swing fit mechanism

adding or removing information from the sound signal

Audio-Technica has been a leader in phono cartridge design for more than 50 years

There are neither capacitors nor transformers between the tubes and headphones

PSB M4U TW1 True Wireless Earphones Black (Open Box) iem cables Intensive research and many years100% wire free headphones No connecting cord between left and right earbuds 6mm dynamic drivers tuned for detailed sound with deep bass earhook design keeps headphones secure while running or exercising IPX5 sweat and weather resistant Wireless, of course, means Bluetooth so PSB engineers utilized the latest advanced version (V4. 1) with A2DP wireless audio technology. Bluetooth V4. 1 provides fast, easy pairing with any compatible device and delivers