Tracker DFU is used to upgrade MOTracker DFU is used to upgrade MOKO Tracker series products.Tracker DFU is an APP for upgrading the firmware of iBeacon products W2-S.If users want to upgrade the firmware of W2-S products, use the Tracker DFU APP, which is easy to operate and efficient.KO Tracker series productDFU is used to upgrade MOKO Tracker series products.