The Copper IUD doesn’t have hormones. It’s wrapped in a tiny bit of copper, and it protects you from pregnancy for up to 12 years.
Hormonal IUDs use the hormone progestin to prevent pregnancy. Depending on which one you choose it can last from 3-6 years.
The birth control implant (AKA Nexplanon) is a tiny, thin rod about the size of a matchstick. It can last up to 4 years.