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. 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. Specifications: Type: in ear Transmission Distance: 10 meters Music Time: About 5 hours Standby Time: About 100 hours Earbuds Battery Capacity: 50mAh Charging Case Battery Capacity: 300mAh Charging Time: About 1-2 hours Automatic boot and pairing: YES Function: Music play/pause, call answering noise reduction, IOS power display, voice prompt. Color: Black Size(approx.): single earbud 22.9 x 16 x 26.5 mm, charging case 64.5 x 44 x 34 mm Package Includes: 2 x Bluetooth Earbuds 1 x Charging Box 1 x Charging Cable 1 x User Manual 3 x Ear Caps (L/M/S size)