Elecom Mono Earset. Device connectivity: Wired, Device interface: 3.5 mm, Cable length: 1.5 m. Headphone frequency: 20 - 20000 Hz, Impedance: 32 Ом. Microphone frequency: 30 - 16000 Hz. Package dimensions (WxDxH): 125 x 30 x 245 mm, Package weight: 130 g