This small device that makes your stuff smart and hard to lose. Now your things can let you know when they're about to be left behind. These devices are sleek and thin, perfect for adding to your keys, bag, or wallet. Features a unique "no-pairing" Bluetooth technology, so they set up in about 30 seconds, easily communicate with your smartphone right out of the box and won’t drain your device’s battery. Using the free mobile app, add and manage up to 20 devices and Safe Zones and see which items are with you. If something is left behind, the device alerts you and gives you directions back to it. Once you're nearby, you can "ring" your device to help find it quickly. Includes: device, Key Ring, Setup Guide, Device Tool, Device Sticker, (Replaceable) CR 2025 Lithium Coin Cell Battery, and 1 Piece Premium Gift Box. Compatible with: iPhone 4s or later (running iOS 9.3 or later) & Android 6.0 or later (with Bluetooth 4.1 or later).