Nio - Bluetooth Item Finder, Key Finder, iPhone and iPad Finder SEARCH & PROTECTS - Nio acts like a "Bluetooth chain" that can be used to protect and search a wide range of items (laptops, briefcases, data sticks and car keys). It also has a proximity alarm up to 20 meters. BUDDY SYSTEM - The Nio Tag and the Nio App work together like a buddy system to protect your device and other valuable belongings. RECHARGEABLE - Nio uses Bluetooth 4.0 Smart technology which is low powered so it only needs to be charged every 2-4 months. SMALL & LIGHTWEIGHT - Nio weighs less than 10 grams and can be attached to almost anything. Very convenient and portable to be carried around, anytime or anywhere. COMPATIBILITY  Works well and compatible with Apple products including iPhone and iPad.