Bluetooth5.3 Supports a new generation of high-speed communication Powerful high-quality sound with ultra-mini in-ears 【 Comfortable inner ear type that spreads a sense of openness 】 Beautiful design decorated with metal etched mesh, 2 .6cm ultra-short stick type streamlined inner ear wearing design, comfortable and natural fit, no listening fatigue even during long listening. The rounded, palm-1/3 size Mini charging case takes advantage of its matte texture, is easy to fit in the hand, and is easy to carry around, with excellent storage and durability. [ Clear and powerful high sound quality 13mm large driver ] Carefully selected 13mm large dynamic driver with titanium-plated liquid crystal polymer diaphragm. While the transparency of the treble range has been greatly improved and the sound is faithful to the original sound, QCY's unique tuning has been carefully adjusted, allowing you to enjoy realistic stereo high-quality sound with powerful and rich bass that resonates comfortably. [ ENC Noise Cancelling Comfortable Hands-Free Calling ] It is equipped with four omnidirectional microphones (two each in both earbuds), and the ENC noise reduction function of Bluetooth V5.3 effectively reduces noise during use. Comfortable hands-free calls that are not affected by environmental noise fully support online meetings and telework. [ Bluetooth 5.3 New Generation Left and Right Independent High-Speed Communication ] It is a completely wireless earphone that realizes a more advanced left-right independent communication method of Bluetooth 5.3 that communicates with the device side individually from the left and right earphones, and improved wireless performance of uninterrupted stable communication, high sound quality, low latency, and energy saving. You can freely choose between binaural and single-ear earphones, and when you take either earphone out of the case, it will be instantly connected to the device at the same time as the automatic power on, so when you use it, just take out the earphones and put them in your ears! [ 68ms low latency mode 20 hours playback power ] Although it is lightweight at about 4g per side, which is the same as a single sheet of A4 paper, it achieves 5.5 hours of continuous playback in stereo mode and a total of 20 hours of playback power when combined with a case. In addition to the normal mode, you can enjoy watching videos and online games without stress in the 68ms low latency mode, which does not feel sound delay. 【 Use the app for more fun and freedom! 】 】 You can use the QCY dedicated app to customize touch operation, adjust the sound quality to your liking, find earphones, and enjoy smart wireless technology more freely as your own custom earphones.