About this item 40H Playback and Dual LED Power Display: These Bluetooth headphones can be used for about 6 hours (50%-60% volume) on a single charge, and with the compact charging case allows you to use them for 40 hours continuously. The digital LED power display on the outside of the case facilitates easy management of power. The LED light will flash the digits from 1% to 100% when charging for the charging case, and the flashing battery icon displays the charging status of both earbuds. 14.2mm Big Dynamic Speaker and 4 ENC Mics: The Bluetooth earbuds built-in 14.2mm dynamic speakers produce a wider frequency range and more detailed sound compared to smaller speakers. Besides, the wireless earphones are equipped with ENC noise reduction double mics to passively cancel 80% of background noise, allowing you and the caller to hear each other better and make crystal-clear calls with minimal background noise. Leading Bluetooth 5.3 Technology and Effortless Pairing: These wireless earbuds