Using this Countryman E6i earset mic is easy. First, adjust the flexible boom to position the microphone close to your mouth for the best sound. Put on the ear - piece gently. Connect the 3.5 mm locking plug to your Sennheiser transmitter. When multiple people use the mic, you can easily re - adjust the boom for each user. For cleaning, use a soft, dry cloth to wipe the mic and ear - pads. Avoid getting the mic wet as it may damage the condenser transducer. Store it in a dry place when not in use. If the cable gets damaged, you can quickly swap it out with a new one. Make sure to check the power requirements and use the correct voltage and load for proper operation.