The sound inside the Bluetooth headphones ensures that you won't miss any part or component of your music. Lossless HD sound quality with deep bass and crystal crisp treble, enjoy your music moment even in a loud environment.. It supports active noise reduction function and intelligent filtering of surrounding environment noise, so that your every call is like face-to-face conversation, and truly realizes the dual ear HD call. The earbuds could be used to answer/reject calling, skip/play/pause songs, and activate voice assistant, such as Siri and android voice assistant. With intelligent voice reminder, helping you to know the real-time status of your headset. One multi-function button design with beautiful button light and LED power display. The earbuds can be used separately or together, you can choose the mode you like. The in-ear design is safe and reliable. There are 3 different sizes of S M L ear tips to choose from, suitable for different ear sizes. these true wireless earbuds against damage from sweat or rain. It won’t get in the way of enjoying sports, music and calls. Perfect for fitness traveling and etc. Small and Mini size design, it can even hide in your ears.