Sennheiser RS 185 RF Wireless Headphone System<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Audiophile style open back， circumaural headphone system with excellent digital wireless audio transmission delivering range up to 328ft/100m (line of sight)</li><li>High-performance Sennheiser transducers deliver precise， detailed and dynamic sound</li><li>Multi-purpose transmitter supports both Digital and Analog Inputs in addition Automatic and Manual Level Control - also functions as 'easy-charge' cradle and docking station for the headphones</li><li>Multi-receiver transmission - transmitter supports up to two pairs of headphones simultaneously (optional HDR 185， sold separately)</li><li>Two year warranty when purchased from an authorized Sennheiser dealer. Signal-to-noise ratio: [Analog input] ALC typ. 85 dBA at 1 Vrms， MLC ≥ 90 dBA， [Digital input] &gt; 90 dBA</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51WCV5ArjKL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/5193vjUEEoL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/01Jiue8LCSS.png" noproxy><img src="http://ecx.images-amazon.com/images/I/81W0n9%2B90xS.png" noproxy>