Earpump Studio Features Bring quality sound to your everyday activities with the SonicGear Earpump Studio. Designed for lightweight, long-wearing comfort, the Earpump Studio is a supra-aural headphone that delivers on all levels. Its collapsible design also makes it more portable than typical headphones. Technical Specifications Speaker Dimension : 40mm X 2 Impedance : 32? Sensitivity : 105dB Frequency Response : 20Hz – 20kHz Cord length : 1.2m Earpump immersive audio Collapsible, great for trips Designed for ultimate comfort Built-in push-to-talk microphone