The Smart Tracker Works with Apple Find My App. It has features like record lost location, rename item, and customize item icon. Connectivity is through Bluetooth for proximity finding. It also has a reverse position feature to locate your iPhone or iPad when you forget where you put it. The device has a built-in speaker and an accelerometer sensor. System requirements include Apple ID, iPhone, and iPod touch models with iOS 14.5 or later, and iPad models with iPad OS 14.5 or later. The tracker is powered by a user-replaceable CR2032 coin cell battery and has a size of 36*36*7.8mm and a weight of 11g. Package includes smart tracker, user manual, and string.