Audio-Technica ATH-SQ1TW True Wireless In-Ear Headphones (Popcorn White) - Manual (Page 20)

19
Unlocking
When you take the headphones out of the charging case, the touch sensor is locked to prevent erroneous operations.
Touch the touch sensors once to unlock the sensors, signaled by the confirmation tone.
The sensor is automatically unlocked during calls on the Bluetooth device (for both outgoing and incoming
calls).