Sennheiser Consumer Audio RS 175 RF Wireless Headphone System for TV Listening with Bass Boost and Surround Sound Modes,Black Description The Sennheiser RS 175 is a perfect complement to your home entertainment system. This digital wireless headphone delivers exceptional sound quality and freedom from wires. The ergonomic around ear, closed back design reduces background noise while providing an exceptionally comfortable fit. You’ll be immersed in the sound of your favorite music, TV or movies without disturbing anyone else in the room! Do not expose to moisture. Features: Compact, ergonomic over-ear headphones. Connectivity Technology: Wireless.Frequency response 17 - 22,000 Hz.Specific uses for product : Communication.Transducer principle : Dynamic, Closed. Carrier frequency : 2.4 2.48 GHz. Bass boost and surround sound listening modes. Maximum sound pressure level: 114 dB at 1kHz, 3 percentage THD. THD, total harmonic distortion: <0.5 percentage at 1 kHz, 100 dB SPL. Range: Up to 100 m Digital wireless technology ensures that signal transmission remains clear and accurate Easy to set up and enjoy MAIN controls located on headphones Wireless communication technology: Kleer Product Details: Brand: Sennheiser Consumer Audio Model Name: RS 175 Color: Black Form Factor: Over Ear Connectivity Technology: RF Product Dimensions: 9.3 x 5.9 x 11.6 inches Item Weight: 10.9 ounces Manufacturer: Sennheiser Language: English Country of Origin: China Item model number: RS 175 Batteries: 2 AAA batteries required. (included) Is Discontinued By Manufacturer: No Date First Available: January 22, 2015 Charging Time: 18 Hours Item Weight: 10.88 Ounces Units: 1.0 Count Number Of Items: 1