Latest Bluetooth Technology: B50 adapts aptx HD technology with Qualcomm Bluetooth chip, which supports Bluetooth 5.2 aptx HD, aptX AD, aptX, aptX LL and able to stream and receive HD music with 2 Bluetooth devices at the same time. Long Range & Stable Transmission: High-end Bluetooth module and precision-tuned antenna ensure Bluetooth coverage and latency. Support APTX HD, APTX LL, APTX Adaptive audio formats over connection range up to 50 feet, stable connection for both reception and transmission. Enjoy HD Music on your headphone with no popping and audible noise. *The Bluetooth transmission distance may vary on different Bluetooth devices that you connected with.