The X-100+ is a handheld auto key programmer that supports over 100 models from manufacturers like Toyota, Honda, Nissan, and more. It can perform functions like cutting new keys, programming immobilizers and ECUs, and cloning keys from memory. The X-100+ has a simple and robust design along with a guided menu system making it easy to use for programming keys and servicing vehicles. It can also be updated online to support additional car models.