Upgraded sound quality & Non-stop callsThe newly upgraded headset have effectively improved the original call problems. There will be no freezes during the call, and the call will remain smooth. The earphones use composite film speakers, the sound is more three-dimensional and clear, the bass is deeper, the treble is crisp, and the distortion is smaller. The sound quality of earbuds is upgraded, allowing you to enjoy immersive music. True wireless earbuds & LED Power DisplayThe LED digital battery indicator outside the Bluetooth earbuds charging case displays the remaining power of the case and the charging status of the earbuds in real time. The 400mAh battery capacity of the charging box can provide 3 full charges for two 40mAh earbuds, 8 hours of playback per charge. You can charge the case with the supplied USB-C cablewhich is more convenient.