This anti-lost adopts latest bluetooth 4.0 low consumption technology, and through corresponding app to realize all the functions. It can effectively protect your kids, pets or valuables from being stolen or lost within 25m effective distance range, when out of this range your phone and it will automatically ring for a timely warning. It can also be used as a excellent remote control selfie shutter and recorder. The location function is extremely perfect for road nerds to exactly find their cars. Benefiting from the built-in low consumption bluetooth 4.0, the battery can last for about 1 year. What's more you can preset 8 devices in one phone at the same time. The ultra small size and lightweight ensures maximum convenience and portability. Specification: Bluetooth version: Bluetooth 4.0 Low Energy Compatible Phone: iPhone 4S/5/5S/5C, iPad Mini, iTouch 5, iPad 3/4, iPad Air and Android system with Bluetooth 4.0 Smartphone(Android 4.3 version and up-grade version) Working distance: About 75 Feet (without barrier ) Suitable for: Wallet, Car, Kid, Pets, Bags,Suitcase or other belongings. Battery : CR2032 Lithium Coin Battery Standby time: 6 month Net Weight: 9 gram Available colors: Black/White/Green/Red (Color will be sent randomly !) Certificates: CE/ROHS/EPL App Name: iTracing (Free of charge) Connects up to 10 iTag unit App language: English, Chinese, French, Spanish Package Including: 1 x Bluetooth Anti-lost( Including batteries) 1 x User Manual 1 x Retail boxUnbranded/Generic