1. Check if your device is connected with treVolo U through Bluetooth.
2. Unmute your microphone.
3. Confirm that the voice assistant of your device is turned on.
In addition, please note that :
A. Actual usage will vary depending on the voice assistants of different devices, as not all voice assistants are supported.
B. For iOS Siri there may be a delay of up to 2 seconds. Please repeat your command if the problem occurs.