Review on Bluetooth Tracker: Convenient Phone and Key Locator for Children by Tyler Markham

Very easy to use. You squeeze your device into apps and it beeps. Or, if you lose your phone, you can triple click the device and it will send an alert to your phone. It has all sorts of extras. I disassembled it and put the battery back with difficulty but figured it out. I'm not sure yet how I know if the battery is low, so I need to keep a close eye on it. EDIT: The company offered me a $10 gift card for a 5 star review. I've only had the product for a few days, but so far it's working very well.