Rainbow Techno Sound Bass. Headphone frequency: 20 - 100000 Hz, Headphone sensitivity: 96 dB, Impedance: 8 Ом. Microphone frequency: 20 - 20000 Hz, Microphone sensitivity: 105 dB, Microphone input impedance: 32 Ом. Certification: RoHS.. Compatibility: Multi, Maximum input power: 1 W