Audio Headphones Stereo Wireless

RS 135

Listen to your favorite music wirelessly, from up to 300 feet away. This RF transmitter and rechargeable wireless headphone reproduces rich sound from almost any source and features auto on/off.
$ 179.95
excludes taxes – free shipping
Article No. 508678


The RS 135 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.

Rediscover the world of wireless freedom with a touch of simplicity and elegance.


  • 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

  • Rechargeable NiMH batteries included (size: AAA)

  • 2-year warranty

What's in the box?

  • HDR 135 headphones
  • TR 135 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

Technical Data

  • Color
  • Impedance
    24 Ω
  • Dimensions
    85 x 225 x 133 mm
  • Connector
    Jack 3,5 mm/6,35 mm stereo
  • Frequency response
    22 - 19500 Hz
  • THD, total harmonic distortion
    < 0.7 %
  • Ear coupling
  • Transducer principle
    Open, Dynamic
  • Weight
    Receiver: 230 g (inc. Batteries)
  • Weight
    Transmitter: 200 g
  • Power consumption
    < 1,8 V
  • Signal-to-noise ratio
    > 65 dBA
  • Operating time
    20 h
  • Modulation
    FM stereo
  • Power supply
    Receiver: 2 AAA cells-rechargeable
  • Power supply
    Transmitter: 9V bloc
  • SPL for peak deviation
    106 dB


  • How do I get the best transmission range out of my wireless headphones?

    While the overall transmission range for wireless headphones is mostly determined by the wireless technology being utilized by the individual wireless headphone product there are multiple external factors (like obstacles, audio signal strength, wireless signal congestion, etc) that can effect the wireless signal transmission range of wireless headphones.

    Obstacles are one of the main factors that can effect the transmission range of the wireless signal. While the wireless signal (with the exception of infrared signals) can pass through obstacles (like walls) ultimately range will be affected (likely reduced) by passing through these obstacles and the more dense the obstacle the greater the effect will be on the signal. For example a signal passing through a glass window won't be affected very much whereas a signal passing through a concrete wall will be effected much more greatly. Having a clear line of sight does provide the best transmission range.

    The audio signal being output by your audio source to the transmitter of the headphones is another key factor in transmission range. A weaker audio signal going into the transmitter means the transmitter has a weaker signal to work with which can in turn reduce the transmission strength which ultimately affects range. Ensure that your audio source is outputting the best possible signal for the transmitter to use.

    RS 135 ( #508678 )
  • Manufacturer's Declaration in relation to Pacemakers RF Compatibility

    RS 135 ( #508678 )
  • What headphones can connect directly into a optical audio output?

    The number of wireless headphones (regardless of manufacturer) that will connect directly to a optical audio output is actually quite limited. The Sennheiser RS 175, RS 185 and RS 195 Wireless Headphones have the ability to connect directly to a digital optical output that is outputting a PCM signal.

    The alternate way to connect to a digital output is to use a digital to analog decoder which will take the digital signal and change it into an analog signal. When using a digital to analog decoder any analog headphones have the ability to be connected to a digital output.

    NOTE: The Digital to Analog Decoder we recommend is the OREI DA 34 as it is a good quality component that not too expensive but does not compromise the audio quality.

    RS 135 ( #508678 )
  • What is the wireless signal range of wireless headphones?

    As an industry standard the range of wireless headphones is measured "line of sight" (headphones from transmitter) as it is the only way for all manufacturers to measure the range in an equal manner.

    The effective wireless signal transmission range (ie: how far the headphones can get from the transmitter) will vary from product to product and is determined by the type of wireless transmission signal being used by the individual wireless headphone system. 

    The effective wireless signal transmission range will also be affected by external factors like obstacles, audio signal strength, wireless signal congestion, etc.

    RS 135 ( #508678 )
  • Why do I only hear sound from one of my audio sources?

    In a situation that where there are multiple audio components (ie: cable box, DVD, player, etc) connected and the headphones are only receiving sound from one of the audio components likely indicates that one of two scenarios is occurring.

    The transmitter is connected directly into an external audio component (like the cable box) and hence can only get sound from that component. To get sound from a different external component the headphones would need to be disconnect from the original external device and connect to the other external component directly.

    A solution to avoid having to unplug from one component and plug into the other component all the time you could use an AV switching box to create a hub where all the external components can be connected into one place. The hub will then provide outputs to run audio to the TV and audio to the headphones as well.

    NOTE: An analog version of an AV Hub can be seen here: ( 

    NOTE: A HDMI version of an AV Hub can be seen here: (

    All of the external audio components are connected directly into a device (TV, Receiver, etc) however the devices are utilizing different types of audio signal (analog, digital, HDMI, etc) and the device that the headphones are connected to can only output some of these signals in a format that the headphones can utilize. The headphones are designed to use an analog signal so this is the type of signal that the device needs to output for the headphones to use.

    The solutions that could be used here would be to try an get all the external audio components connected using the same type of audio signal and utilize something like the AV Hub mentioned above. Alternatively a component like a Digital to Analog Decoder or Digital Audio Decoder which will accept different forms of audio signals (including multi-audio stream signals like HDMI) and convert the signals back to analog for the headphones to use could also be utilized.

    NOTE: A couple of the versions of the Digital to Analog Decoder are as follows: 
    - GEFEN Digital Audio Decoder ( Digital-Audio-Decoder/dp/B0021QBIBQ/ref=sr_1_2?ie=UTF8&qid=1393427713&sr=8-2&keywords=GEFEN+digital+to+analog+decoder)

    - OREI Digital to Analog Audio Decoder (

    RS 135 ( #508678 )
  • Why don't I get audio from all sources (Netflix, Apple TV, Amazon FireStick, etc)?

    Audio coming from certain content providers or devices (Netflix, Roku, Apple TV etc.) typically use an advanced digital audio signal such as HDMI or advanced Dolby audio. These cannot be translated into analog or PCM by most television software and so the signal is not passed through into the headphones. As a result you may get silence or audio from a different source like your cable box.

    In order to resolve this, you will you will need to change the audio output format in the app or device to PCM (may be in the smart hub on some TVs) or you will need a digital to analog decoder. The Digital to Analog Decoder will take the advanced digital signal and decode it into an analog signal that your headphones can utilize.

    You will not lose audio quality as the digital signal is a carrier signal only. Any audio you hear from your TV speakers, sound bar or headphones is an analog signal. The digital signal is translated by the TV, receiver or other device by the time it reaches the transducers. The only difference is where the audio signal is translated.

    If your digital optical output is not in use we recommend the OREI DA34. The OREI DA 34 can be seen here: (

    If the digital optical output is already being used by a device like a sound bar you will want the J-TECHDigital to Analog Decoder because it offers both an analog output for the headphones to use and an optical output for the soundbar (or other device) to use. The J-TECH can be seen here: (

    Please bear in mind that we recommend these specific devices because we have tested them and know that they work. We do not recommend digital to analog CONVERTERS (a different device entirely) because they cannot translate the more complex digital audio signals.

    NOTE: We do suggest looking at your TV's documentation to make sure that there are no design features that prevent certain digital signals (like HDMI signals) from being output through the Digital Optical output before purchase. It is possible for this feature to exist but exceedingly rare so for most applications the Digital to Analog DECODER is the optimum solution. 

    RS 135 ( #508678 )


  • Safety Guides
    • Safety Guide RS 11x/RS12x (6.7 MB) Download

  • Quick Guides
    • Quick Guide RS 118, RS 120-II, RS 127, RS 135 (2.2 MB) Download

  • Instruction Manual
    • Instruction manual RS 135 (1.9 MB) Download