[Dual Dynamic Drivers & Crossovers] - The dual dynamic drivers in each earbud with exclusive crossover ensures resonant bass and crystal-like treble performance, which creates a immersive and melodious listening experience for you. The beryllium-plated + composite diaphragm speaker provides premium sound that never had [Qualcomm 3020 & Qualcomm aptX] - High-tech Qualcomm 3020 chipset, featuring the low power consumption and the stable connectivity, plus the latest Bluetooth 5.0, stable transmission speed can be ensured at any time and anywhere .The advanced Qualcomm APTX codec delivers Hi-Fi Stereo sound and clear calls with Qualcomm cVc noise cancellation [27 Hours Working Time] - The charging case holds roughly 4 full charges and each charge works for roughly 6 hours, 27 hours playtime in total, makes you enjoy wonderful moment all day without any interruption [Mono/Binaural Use/Multifunction Button] - The earbuds can be used separately after successful pairing, after took out of charging case, they will automatically power on and enter into pairing mode . The press button of earbuds supports a lot of functions such as volume up/down, play/pause music, answer/hang up a call, the next/previous song, activate Siri and so on