Rainbow Raptime. Cable length: 0.20 m. Headphone frequency: 20 - 16000 Hz, Headphone sensitivity: 89 dB, Impedance: 32 Ом. Microphone frequency: 50 - 13000 Hz, Microphone sensitivity: -58 dB, Microphone input impedance: 2200 Ом. Certification: RoHS.. Operating voltage: 10 V