11-hour battery life With up to eleven hours of continuous audio playback on a single charge, there’s enough juice to last all day. Call and music controls on earcup Control music playback and answer calls on the fly with buttons and microphone placed conveniently on the earcup. JBL Pure Bass sound For over 60 years, JBL has engineered the precise, impressive sound found in big venues around the world. These headphones reproduce that same JBL sound, punching out bass that’s both deep and powerful. Flat-foldable, lightweight and comfortable / Bluetooth 4.0 / Dynamic driver : 32mm / Frequency response : 20Hz – 20kHz