Sennheiser Wireless Headphone System
RS 165

Sennheiser's RS 165 is a superb digital wireless headphone system for movie watching and music. Its ergonomic, closed, circumaural design reduces background noise while providing an exceptionally comfortable fit, so that you can focus on enjoying your favorite television programs and movies.

Closed, circumaural headphones with excellent digital wireless audio transmission
High-quality Sennheiser transducers and a selectable Bass Boost mode for vibrant sound
Intelligently designed controls for maximum ease of use
Multi-purpose transmitter – also functions as ‘easy-charge’ cradle and docking station
Multi-receiver transmission – transmitter supports up to two pairs of headphones simultaneously
Ergonomic design for enhanced wearing comfort
2-year warranty

What's in the box?
HDR 165 headphones/TR 165 transmitter/Audio cable (analog)/Power supply with 4 adapters (EU, UK, US & AU)/2 AAA NiMH rechargeable batteries/Quick guide

Specifications
Headphones
Frequency response 18 - 21,000 Hz 
Max. sound pressure level 106 dB at 1kHz, 3% THD 
THD, total harmonic distortion <0.5 % at 1 kHz, 100 dB SPL 
Transducer principle dynamic, closed 
Weight 300 g (incl. batteries) 
Operating time up to 18 hrs

Transmitter
Audio input 1 x 3.5 mm stereo 
Power consumption ≤ 0.3 W (standby) 
System
Range Up to 30 m 
Signal-to-noise ratio typ. 85 dBA at 1 Vrms 
Modulation 8-FSK Digital 
Carrier frequencies 2.4 – 2.48 GHz