Sennheiser RS 120 II Wireless System

Code: 508681
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Manufacturer Sennheiser

Rediscover the world of wireless freedom

The RS 120 II wireless headphones not only opens you to a world of true freedom of movement but also, breathes new life into audio with its sleek design. Its detailed, balanced sound reproduction coupled with strong bass response makes it an ideal choice for all types of music and TV applications.


  • Open, stereo, supraaural, wireless RF headphone system
  • Detailed, analytical sound reproduction with strong bass response
  • Suitable for all types of modern music and TV applications
  • Wireless freedom with reception through walls and ceilings
  • Range of up to 100 metres (300 feet)
  • Control elements conveniently positioned to provide easy, intuitive operation
  • Transmitter with metal cradle for storing and recharging the headphones
  • Optional wall mounting of transmitter possible
  • Very lightweight headphones, extremely comfortable to wear
  • Appealing, modern design

What's in the box?

  • HDR 120 II headphones
  • TR 120 II transmitter with audio connecting cable
  • Mains unit
  • Two rechargeable batteries, 1.2 V, AAA size, Ni-MH
  • Adaptor, 1/4" (6.3 mm)
  • Quick Guide
  • Safety Guide
Ear Coupling:
Open acoustic
Home Audio and TV
Sound Systems:
Frequency Response (Headphones):
22Hz - 19.5kHz
Impedance (Headphones):
24 Ω
Sound Pressure Level (SPL):
106 dB (1 kHz, 1 Vrms)
Total Harmonic Distortion (THD):
< 0.7 % (at 1 kHz, 100 dB SPL)
Transducer Principle:
Dynamic, Open
Operating time:
20 h
Battery Specification:
2 NiMH Batteries AAA size, rechargeable (1.2 V)
Power supply (transmitter):
100-240 V, 0.1 A / 9 V DC, 340 mA
Power consumption:
< 1.8 W
RF (Radio Waves)
Interface (transmitter):
3.5 mm stereo jack / adaptor 3.5 mm jack to 6.3 mm
up to 100 m (line of sight)
Carrier frequencies:
863.3 MHz – 864.7 MHZ
Signal-to-noise ratio:
> 65 dBA
FM stereo
Headphones: 230 g
Transmitter: 200 g
Volume Control
Additional Accessories:
Sennheiser HDR 120 II Headphones - Product Front Left
Sennheiser HDR 120 II Headphones
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