Red4Power R4-H003. Device connectivity: Wired, Device interface: 3.5 mm, Cable length: 2 m. Ear coupling: supraaural, Headphone frequency: 20 - 20000 Hz, Impedance: 32 Ом. Microphone sensitivity: 105 dB, Microphone connectivity: 3.5 mm. Dimensions (WxDxH): 115 x 180 x 55 mm, Weight: 176 g. Certification: RoHS, CE