The RS 130 wireless RF headphone system with switchable surround sound is an ideal choice for both hi-fi, TV, and MP3 players. The lightweight RS 130 lets you enjoy freedom of movement from any audio source. In addition, the transmitter features a convenient metal stand for storing and recharging the headphones. These headphones will absolutely not dissapoint. If you are one who is irritated with the portability (or lack of) of your satellite receiver, this is clearly the way to go. Sennheiser We are proud to bring the Sennheiser line of product to satellite radio. They make quality, long-lasting headphones that are built to please. Sennheiser is recognized as the world leader in microphone technology, RF-wireless and infrared sound transmission, headphone reducer technology, and active noise-cancelling. Their variety of products are made to fit everyones needs. If you are a tough person to satisfy, Sennheiser is the way to go. Package Details: Includes: • Wireless RS 130 Headphones • Chrager Base • Rechargeable Batteries Product Features: Open, Circumaural: Open, circumaural wireless stereo RF headphone system Hi-Fi: For hi-fi and TV use Surround Sound: Switchable SRS surround sound mode Memory: Intelligent auto-tuning with memory function Optimal Signal Control: Self-learning automatic level control provides optimum signal reception Lightweight: Very lightweight headphones, extremely comfortable to wear Easy-to-Charge: Easy recharging: simply hang the headphones onto the charging cradle. Batteries Included: Rechargeable NiMH batteries included Product Specifications: Headphones Transducer Principal: Dynamic, opened Headphones Frequency Response: 18-21000Hz Headphones Weight w/o Cable: approx. 275g Headphones Characteristic Spl: at 1 kHz 104 dB Headphones Ear Coupling: Circumaural Headphones Distortion: < 0.5% Headphones Power Supply: 2.4 V & 3 V via 2 AAA size NiMH batteries (LR 03) Headphones Battery Life: 22 Hours (approx) Headphones Modulation: FM stereo Receiver Carrier Frequency: 926.1; 926.8; 927.5 MHz Receiver Operating Time: 22 Hours Transmitter Modulation: FM stereo Transmitter Carrier Frequency: 926.1; 926.8; 927.5 MHz Transmitter Signal to Noise Ratio: > 68 dBA Transmitter Broadcast Distance: up to 100 m Connector: 3.5 mm stereo jack plug with adaptor to 1/4” (6.3 mm) Technical Specifications: Model #: RS 130 Manufacturer: Sennheiser Weight: 5 lbs. Available Documentation: In order to view our radio hardware manuals online, you will need to have Adobes Acrobat Reader installed on your computer. If you do not yet have Acrobat Reader, please visit Adobes web site to download the reader free of charge. RS130 Sennheiser Wireless Headphones User Guide (n/a)