Add an extra transmitter and up to 100 headphones to easily swap among 3 different audio sources.
Choose between well-balanced audio or a clear voice mode that makes on-screen conversations clearer.
Stay connected almost anywhere in the house with a 100ft / 30m operating range.
Adjust your own volume (up to a louder-than-average max volume of 120dB) without affecting others’.
This is a modal window.
Plug each transmitter into a power source and connect to your TVs’ audio output ports
Power on the transmitter and headphones. Swap them to the same channel and they will automatically connect.
Change your TV audio settings to “PCM / Stereo.”
Sit back, relax, and enjoy!
![]() Avantree Shift | ![]() Avantree Quartet | ![]() Avantree Duet | ![]() Avantree HT41899 | |
Customer Reviews
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4.3 out of 5 stars
77
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4.4 out of 5 stars
145
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4.4 out of 5 stars
732
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4.4 out of 5 stars
4,264
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Price
| £28.92£28.92 | £229.99£229.99 | £161.49£161.49 | £139.99£139.99 |
Works with 2-3 TVs Together
| ✔ | ✘ | ✘ | ✘ |
Easily Swap Links between TVs
| ✔ | ✘ | ✘ | ✘ |
Supports up to 100 Headphones
| ✔ | ✔ | ✔ | ✘ |
Volume Boost Mode
| ✔ | ✔ | ✔ | ✘ |
Dialogue Clarity
| ✔ | ✔ | ✔ | ✔ |
Pass-Through Support
| ✔ | ✔ | ✔ | ✘ |
Charging Base & Transmitter
| ✘ | ✘ | ✔ | ✘ |
Headphones Work Independently
| ✘ | ✘ | ✘ | ✔ |
Wireless Tech
| 2.4G RF | 2.4G RF | 2.4G RF | Bluetooth |
Can I use both headphones with one transmitter?
Yes, one transmitter can output audio to both headphones simultaneously.
Can I add more headphones / transmitters?
Yes, you can add an additional Shift-Extra transmitter and up to 100 Shift-Extra headphones while still maintaining cross-compatibility.
What are the power requirements for the transmitters?
You can power the transmitters using a USB port or any other power source that supports 5V/500mA-2A.