Features: 1. Bluetooth version: Bluetooth 4.0 Low Energy 2. Compatible Phone: iPhone 4S/5/5S/5C, iPad Mini, iTouch 5, iPad 3/4, iPad Air and android system with Bluetooth 3.4.0 Smartphone(android 4.3 version and upgrade version) 4. Working distance: About 75 Feet (without barrier) 5. Suitable for: Wallet, Car, Kid, Pets, Bags, Suitcase or other belongings. 6. Battery: CR2032 Lithium Coin Battery 7. Standby time: 6 month 8. Net Weight: 9 gram 9. Colors: green 10. Certificates: CE/ROHS/EPL 11. App Name: iTracing 12. Connects up to 10 iTag unit 13. App language: English, Chinese, French, Spanish Package include: 1 x Smart Bluetooth Itag. It is not only compact in terms of design, it scores high on the aspect of utility too. This is what makes it worth the buy.