The SpotLoss fob is a compact device that helps you locate your phone, keys, or children. It also acts as a proximity alert system, notifying you if the fob and your phone are more than 50 meters apart or within 50 meters of each other. You can receive notifications through an alarm, text, or email. The fob runs on a replaceable watch battery for approximately a year and can easily attach to various objects with its carabiner style design. The company offers a free cell phone app and plans to release an SDK for developers interested in using their hardware.