Using these Behringer rack ears is easy. First, find the 80 HP Eurorack chassis you want to use. Then, attach the rack ears to the chassis. Make sure they're firmly in place. After that, you can mount your Behringer synthesizers or other 3U format equipment onto the rack ears. When handling these rack ears, be gentle to avoid any damage. For maintenance, keep them clean by using a dry cloth to wipe off dust regularly. Store them in a dry place when not in use to prevent rusting or other damage.