Wireless Connection, Special APP has powerful functions The ESC is wirelessly connected to smartphonevia OTA Programmer. Use Hobbywing HW Link APP to clearly display and adjust all parameters of ESC. The interface is simple to operate. Please download the new version of V2 App. Intuitive Interface When use app to adjust parameter, the graphical man-machine interaction interface of drop-down list box and scroll bar make the parameter adjustment more flexible and easier to operate. Real-time data recording function OTA programmer supports real-time data recording function and stores the data in its memory. It can be opened by HW Link to know the running status of power system. The real-time data can be checked by connecting smartphone HW Link App within effective distance (0-3m). *The real-time data function needs to be supported by the ESC. Please refer to the manual of ESC for details. Simple and Convenientfor Firmware Update Compared with LCD programming box, there is no need to connect the computer to upgrade the firmware of ESC. The firmware of ESC can be upgraded only by using HW Link App on the smartphone. More simple and easy to operate. Bluetooth transmission and does not affect network of smartphone OTA Programmer uses Bluetooth to communicate. It does not affect Wi-Fi and cellular data network of smartphone and network requirements of other Apps. Compact Design This OTA Programmer is smaller and lighter. Only 1/6 of HOBBYWING LCD program box in size and weight. One-touch Factory Reset Users can promptly factory reset their OTA Programmer via the Reset button on it.