TWS (True Wireless Stereo) allows you to sync with other H11s. For this mode to work, you will need to have two Spirito H11 microphones on hand. 1) Power on both microphones but DO NOT connect them to your music yet. 2) Press the Mode button on each microphone twice in rapid succession 3) You should hear a sound effect indicating the two mics have been paired. 4) Connect one of the microphones to your music using your preferred playback mode. 5) Both microphones will now play the same music simultaneously.