The finder is compact and easy to carry.Binding with your mobile devices,which could be widely applied to the anti-lost and finding of your wallets,children,pets,briefcases,luggage and drag boxes,and some other valuables.You don’t need buy any external devices to your iPhone or iPad with BLE4.0 ,you just need to download the APP of finder of RF-Star.You can set the alarm conditions(anti-lost or finding),four kinds of alarm modes(sounding with shaking).When your mobile devices and finder are beyond the effective distance,they will alarm.They could find with each other.