*This multifunction program box is for programming HOBBYWING brushless ESCs. Its friendly LCD interface makes ESC programming easy and quick. With a PC, you can upgrade ESC firmware and further adjust ESC parameters online. Besides, it's compact, portable and very applicable for field use. Thanks to built-in OTA programming feature through Bluetooth, you can now use this device with IOS devices. *A separate battery is needed for powering this program box when the ESC has no built-in/external BEC. *This multifunciton LCD program box is applicable for the following HOBBYWING products: Platinum series of brushless aircraft ESCs, XeRun & EzRun MAX series (V2.0 and later), Platinum and SEAKING PRO series. This device also works with some ESC of QUICRUN series.