Latest Bluetooth 5.1 Technology and Dual LED Display: True wireless earbuds bluetooth 5.1 are equipped with the most advanced Bluetooth 5.1 chip, which provides more stable connection(15m), faster paring(just need 2 seconds ) and universal compatibility. Rid of cord, enjoy true wireless. With the individual LED display on the case can help check the remaining power of the wireless bluetooth earbuds and charging case at any time.