Using this Shure wireless system is easy. First, make sure you have a compatible power supply as it's not included in the package. Insert the required batteries into the handheld transmitter. Turn on the ULXS4 receiver and the ULX2 handheld transmitter. Adjust the settings on the receiver to match the frequency of the transmitter. You're now ready to use the system for your audio needs. When it comes to safety, always check your country's wireless frequency laws. Using an illegal frequency range can get you in trouble. For maintenance, keep the system clean. Wipe the transmitter and receiver with a soft, dry cloth regularly. If the grille's dent bothers you or affects performance, you can consider getting it replaced. Also, store the system in a cool, dry place when not in use to prolong its lifespan.