Method 1: Check the Indicator Light Status
After a successful connection, the TX indicator on the Primary USB-C RX displays blue, while the TX indicator on the Secondary USB-C RX displays yellow; flashing lights indicate that the TX has not yet been connected.
After a successful connection, the RX indicator on the Primary Camera RX displays solid blue, while the RX indicator on the Secondary Camera RX displays solid yellow.
Method 2: Check the App Display
After properly connecting the receiver to your phone, open the HollyAudio app. On the main device control interface, the RX labeled “Master” is the primary RX, while the RX labeled “Remote” is the secondary RX.