The teleporter is a new tool added from a recent update in CastleMiner Z. Unlike the locator, where you have to place a beacon which only marks the location, the teleporter can teleport you back to your beacon by pressing the left trigger. Once done, you'll be at the exact spot were you placed your beacon at, and also note that you will lose the teleporter after you have used it. You can place unlimited markers with this, which makes it a far better substitute than the locator. It requires some rare items to craft, including Bloodstone and Sand (if you have traveled farther than the Desert biome).