Features:* Two-way anti lost* A key finding things* The location information* Ultra-low power consumption* Multitasking managementSpecifications:Bluetooth version: Bluetooth 4.0 Low Energy.Compatible Phone: iPhone4S/5/5S/5C， iPad Mini， iTouch 5， iPad 3/4， iPad Air and Andriod system with Bluetooth 4.0Smartphone(Andriod 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 (Not included).Standby time: 6 monthNet Weight: 9 gramAvailable colors: BlackCertificates: CE/ROHS/EPLApp Name: iTracing (Free of charge)Connects up to 10 iTag unitApp language: English， Chinese， French， SpanishCompatible Devices:iPhone5S/5C/5/4S， iPad 5th/4th/3rd gen， iPad mini， iPad Air， iPod touch(5th gen); Andriod system with bluetooth 4.0 Smartphone (Andriod 4.3 version and up-grade version)How to use: download an App iTracing (Free of charge)， open your bluetooth and connect to the tracker， then you can use it.Package Included:5x bluetooth Tracker (Battery Not Included)