Closed back, circumaural headphone system with excellent digital wireless audio transmission delivering range up to 30 meters(100-foot). Connectivity Technology: Wireless
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
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
Multi-purpose transmitter with Analog Input - also functions as 'easy-charge' cradle and docking station for the headphones
Sennheiser RS 165 RF Wireless Headphone System