Receiving mode: When Bluetooth-compatible is not connected, the blue light flashes quickly, and the blue light stays on when the connection is successful. In TF card mode, the blue light flashes once for 1 second when reading the card, and the blue light stays on when the pause is on
Transmitting mode: When transmitting, the green light flashes quickly, and the green light stays on when the transmission is successful. In TF card mode, the green light flashes once for 1 second when reading the card, and the green light stays on when the pause is on