Sennheiser RS 165 RF Wireless Headphone System - Black NOB

Sennheiser RS 165 RF Wireless Headphone System - Black       Contents: Come with accessories in retail box.New Opened Box Condition.     Closed back, circumaural headphone system with excellent digital wireless audio transmission delivering range up to 30 meters(100-foot). Connectivity Technology: Wireless    High-quality Sennheiser transducers and a selectable Bass Boost mode for exceptional sound. Range-Up to 30 m,Max. sound pressure level 106 dB at 1kHz, 3% THD. Signal-to-noise ratio - typ. 85 dBA at 1 Vrms . Frequency response - 18 - 21,000 Hz    Multi-purpose transmitter with Analog Input - also functions as 'easy-charge' cradle and docking station for the headphones    Carrier frequencies: 2.4 – 2.48 GHz. Multi-receiver transmission - transmitter supports up to two pairs of headphones simultaneously (optional HDR 165, sold separately)    Two year warranty when purchased from an authorized Sennheiser dealer.    Range Up to 30 meters