Advanced Bluetooth 5.3 technology: headphones wireless bluetooth is equipped with the latest version of Bluetooth 5.3 chip technology which is stable and with low latency, increases the speed of audio data transmission by 80% and provides a high-sensitivity antenna for optimised Bluetooth transmission, so you can enjoy continuous and stable calls even in areas with complex signal (transmission range is up to 10-15m). Wireless bluetooth headphones are equipped with the latest version of Bluetooth 5.3 chip technology