Using your Electrolux ErgoRapido ZB3107 replacement unit is easy. First, make sure to properly install it into your existing vacuum setup according to the original design. When in use, simply hold the handpiece and switch it on to start cleaning. Be aware that this unit doesn't come with a dust container or charger, so you'll need to use your existing ones. When not in use, store it in a dry place. For maintenance, check the batteries regularly. If they seem to be losing charge quickly, it might be time to consider replacing the whole unit again. Also, keep the motor and switch clean from dust and debris. Don't try to use this unit with models other than the ones it's listed as compatible with, as it may not work properly.