Stereo headphones with microphone. PC, smartphone, mobile phone and tablet compatibile. Technical specifications: speaker: 40mm; impedance: 32ohms; sensitivity: 106db ± 3db; frequency response: 20Hz-20,000Hz; Power Handling Capacity: 20mW; nominal power: 10mW; cable length: 1,5 mt ± 10%; Jack: 3.5mm (1/8') Stereo.