SmartTag2 to replace the Tile my daughter bought me. I probably wouldn’t have bought it in the first place but I ended up using it often. It started as a luxury and turned into a necessity. The Tile’s battery died months ago, and you have to replace the whole device. This new device was cheaper than a new Tile and has a replaceable battery. And the battery is supposed to last longer. I recently lost my keys for a few days and realized I don’t have a spare car key. I bought a new one for around $70.