Earpumpª Studio Pro Studio Quality Headset with 50mm drivers Features Big cushy earphones with big cushy sound – that’s what the Earpumpª Studio Pro delivers to long-wearing users who need to be immersed in music from sun up to sun down. If you’re looking for a studio-like experience and love listening to music for hours on end, here’s the perfect pair of headphones for you. Sink deep in to your musical realm with your new “Me Time” pal, the Earpumpª Studio Pro. Technical Specifications Headphone Specifications: Driver size: 50mm Total Built-in Driver: 2 Frequency response: 20~20KHz Impedance: 32? Sensitivity: 105dB+-3dB Rated power: 20mW Maximum input power : 100mW Audio jack: 3.5mm Stereo Additional Audio Port: 1 x 3.5mm Stereo Port Cable length: 1.2m Microphone: Frequency response: 20~16KHz Sensitivity: -55dB+-3dB Size: 4 x 1.5m