Using the Elite Core HS - 10 earset system is easy. First, choose the appropriate earpiece size for a comfortable fit. If you're using it for general applications, the standard 3.75 - inch boom arm is a good choice, but for children's theater or as a wig mic, go for the 2.5 - inch short boom. Attach the microphone to your ear and position it according to your needs - on the left or right ear, clipped like a label, or at the hairline. When it comes to cables, pick the ones that match your wireless system. Make sure the connections are secure. As for maintenance, keep the microphone and earpieces clean. You can use a soft, dry cloth to wipe them. Don't expose the system to extreme temperatures or moisture. Also, be gentle when detaching and re - attaching the earpieces to avoid damage.