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. 1-Button remote with microphone. Control music playback with a convenient one-button remote. Got an incoming call? Answer It on the fly with the built-in microphone A flat cable that’s durable and won’t tangle up in knots. Technical Specifications: Plug: 3. 5mm. Dynamic driver: 9mm, frequency response: 20Hz – 20kHz.