Sennheiser Wireless Headphones RS180

In the RS 180, Sennheiser delivers an excellent sound reproduction. Using an open, circumaural design, the headphones can breathe from both sides of the ear cups, offering you an excellent sound image.

This wireless headphone sytem utilises Kleer's uncompressed digital wireless audio transmission and can serve up to four pairs of headphones. In addition, it gives you the freedom to travel up to 100m (line of sight) from your sound source.

The RS 180 is also equipped with balance and automatic level controls. The former provides for right/left volume adjustment while the latter for improved speech intelligibility as well as to ensure that the headphones always reproduce at optimum audio levels. Like the RS 170, the transmitter for the RS 180 is multi-functional - doubling as an 'easy-charge' cradle and docking station.

All in all, the RS 180 offers a superb sound and an effective wireless range, making it your ideal listening choice!
Features
Open, circum-aural digital wireless headphones with Kleer's uncompressed audio transmission
Dynamic transducer systems with powerful neodymium magnets for clear and detailed audio reproduction
Multi-purpose transmitter - Also functions as 'easy-charge' cradle and docking station
Multi-receiver transmission - Up to 4 people listening to the same source
Automatic level control for optimum audio levels
Balance control for right/left volume adjustment
Ergonomic and adjustable headband for an excellent and secure fit
Extremely comfortable velour earpads and headband cushions
No set-up required – Just plug and play!
2 year warranty
Delivery Includes
HDR 180 headphone (receiver)
TX 180 transmitter
Multi-country charger
Detachable audio cable
RCA cable
3.5 / 6.3mm adapter
2 AAA NiMH rechargeable batteries
Instruction manuals 

System requirements
Modulation MSK Digital
Carrier frequencies 2.4 – 2.48 GHz
Range approx. 100 m in the open area
Rated Input 100 - 240 V, 0.2 A, 50/60 Hz
Transmitter
Audio input 3.5 mm stereo
Audio output RCA
Power consumption < 0.5 W
Power supply 5 V DC , 500 mA
Signal-to-noise ratio 85 dBA (0.5 Vrms, 1kHz)
Weight approx. 204 g (without batteries)
Dimensions 12,5 cm x 11,2 cm x 23,0 cm
Headphone
Transducer principle (Headphones) open, dynamic
Ear coupling circumaural
Sound pressure level (SPL) 110 dB
THD, total harmonic distortion <0.5 % a 1 kHz, 100 dB SPL
Frequency response 18 Hz - 21000 Hz
Impedance 32 Ω
Charging time approx. 16 hours
Power supply 2 NiMH-Akkus Typ AAA, 1,2 V, 600 mAh
Operating time approx. 24 hours
Weight approx. 204 g (without batteries)
Power supply
Rated Input 100 - 240 V, 0.2 A, 50/60 Hz
Rated Output 5 V DC, 500 mA
Operating temperature 0 °C to 40 °C / 32 °F to 104 °F