Using this watch set is easy. First, you can choose the base RideWatch as your main watch. Then, if you want to change the look, simply swap out the faceplates to represent different versions. Just keep in mind that when you change the faceplates, the sound won't change automatically. As for maintenance, keep the watch and faceplates in a dry place. Avoid exposing them to extreme temperatures or water. When you're done using it, store it in a safe spot to prevent scratches or damage. If you're ordering from within the USA and pay in full, you'll enjoy free shipping.