Ugreen true wireless ear buds support twin mode and mono mode, you can switch freely between 2 modes. Qualcomm cvc 8.0 noise cancelling tech and mems microphones, provides crystal-clear sound. Perfect to deliver immersive stereo sound, give access to lossless auditory enjoyment. Unbreakable 33ft strong connection, extremely low power consumption, high fidelity sound with imperceptible low latency. Ugreen wireless earphones support usb-c quick charge, up to 9 hours playtime, and can be extended to 27 hours with the charging case. Compact size, lightweight, ergonomic design, 3 size tips (s/m/l) ensuring comfortable wearing.