RS140 Sennheiser Wireless Headphones are is a closed back (sealed) headphone has all the latest features that make it second to none. It features a switchable dynamic compression system for excellent speech intelligibility and balance control for optimum right/left volume adjustment--a great feature if you are hard of hearing in one ear and if you want to make your friends jealous. The RS140 has a high output level and the on/off switchable sound compression electronics improves speech intellegibility and maximizes sonic clarity. The sealed earcup design limits the amount of "leakage", providing isolation and attenuates effectively- meaning you can listen to your favorite tunes without your family having to put up with it and without them disturbing you. Just plug it into your audio source (TV, Satellite Radio, MP3 player) and peace will be had until you are forced to take them off. For being wireless headphones, the sound quality is second to none. The base range for the RS140 is 100 meters--varying some with obstructions in the way. 3 seperate channels are available for signal transmission from the base unit to the headphones to avoid possible audio interference. The headphones have large circumaural earpads covered in velour and a full-size headband that is fairly lightweight (15 oz.) and comfortable. The base transmitter doubles as a recharging station by simply hanging the headphones on the base and will last roughly 22 hours per charge. Everything you need to get this item going is provided, including a full two-year product warranty. Package Details: Includes: • Sennheiser RS140 Headphones • Charger base • Rechargeable Batteries Product Features: • Closed: Closed, circumaural wireless stereo RF headphone system • Hi-Fi: For Hi-Fi and TV use • Switchable: Switchable compression ensures excellent speech intelligibility • Balance: Balance control for right/left volume adjustment • Output Level: High output level (adjustable) suitable for compensating for moderate hearing loss • Auto-Tuning: Intelligent auto-tuning with memory function • Signal Reception: Self-learning automatic level control provides optimum signal reception • Lightweight: Very lightweight headphones, extremely comfortable to wear • Recharge: Easy recharging, simply hang the headphones onto the charging cradle • Batteries: Rechargeable NiMH batteries included • Transmitter: Transmitter can be wall mounted •Time: Operating time approx. 23 hours • Warranty: 2-year warranty Technical Specifications: Model #: RS140 Manufacturer: Sennheiser Shipping Weight: 5 lbs. Available Documentation: In order to view our radio hardware manuals online, you will need to have the Adobe Acrobat Reader installed on your computer. If you do not have Acrobat Reader, please visit the Adobe web site to download the reader free of charge. RS140 Sennheiser Headphones