To use this Azden 305LT wireless microphone system, first, turn on the 305UPR portable receiver and the 35BT beltpack transmitter. Attach the EX - 503L lavalier microphone to your clothing as needed. Make sure the transmitter and receiver are paired correctly. When not in use, keep the system in the included case to protect it. For maintenance, keep the devices clean and dry. Avoid exposing them to extreme temperatures or humidity. If there are any issues, check the batteries and connections first.