Audio improved: The graphene-integrated drivers reduce interference and distortion, allowing for precision and absolute clarity. Effortless calls: Two built-in microphones with uplink noise isolation filter out external noise, providing clarity and top-notch sound quality for you and your conversation partner. Fantastic playback time: With charging technology and a state-of-the-art Bluetooth chipset, Liberty offers 5 hours of non-stop playback or an additional 15 hours (20 hours total) with the included charging case. (This applies to playback at a volume of 50%.) Touch Control: With the minimalist touchpad of the Liberty, you have complete control over your music and calls with simple touch controls. A breeze: After the initial setup, just take the Liberty out of the charging case, and they will automatically connect to your device. Voice Assistant: Simply use the touchpad on the left earbud to activate your voice assistant. IPX5 waterproof: The completely waterproof casing effectively protects the internal components from water and sweat.