Sennheiser RS 175 Digital Headphone System Set

Description: Handset frequency: 17-22,000 Hz. Headphones sensitivity: 114 dB. THD: 0.5%. Driver type: dynamic. Modulation: FSK acoustic system: closed signal, to noise ratio (SNR): 85 dBPack. AC Adapter.

Purchased from: https://www.amazon.de/-/en/gp/product/B00RGRPPIC/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1, used 3-4 times only.

More info: https://en-us.sennheiser.com/hdr-175