The HDR 175 is the optional wireless headphone for use with the RS 175 RF wireless headphone system. This headphone pairs with the RS 175 system allowing two listen wirelessly at the same time.
High-quality Sennheiser transducers for exceptional sound
Designed exclusively for use with the RS 175 RF Wireless Headphone system (sold separately). Frequency response : 17 – 22000 Hz. Maximum sound pressure level : 114 dB at 1kHz, 3 percentage THD
Two year warranty when purchased from an authorized Sennheiser dealer.
Connectivity technology: Radio Frequency wireless