Audio Technica ATH-CK1TW

Using the product
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Press and hold (about 2 seconds) the multifunction button on the R (right) side headphone and
release your finger when you hear the confirmation sound.
The speech recognition feature (such as Google Assistant or Siri) is activated.
The speech recognition feature cannot be activated during a call.
Auto power off function
The product automatically turns off after 5 minutes of not being connected to a device.