Anti-lost tracker, keep your valuables within range. Down load the ' iFindU' APP in the App Store or Google Pay. Our anti-loss tracker connects to your phone via Bluetooth. The tracking range is 15-30meter (Depands on whether there is an obstruction). You can attach it to every item and chase them. Alarms will activate when it is out of valid distance, it will connect the application automatically(Max add up to 4 devices). So you can put it on your items, then don't worry about them lost or stolen. Extremely light weight, take it everywhere without slowing you down.