1:As an parameter adjustment device, directly use the built-in LCD screen to display, set, and share ESC parameters (import). 2:Connect the ESC to a computer using a USB adapter. Use the USB Link application software on the computer to upgrade the ESC firmware and set parameters. 3:The OTA Bluetooth module: Using the mobile APP to set ESC parameters, upgrade firmware, and read data. 4:Detect the overall voltage of the lithium battery and the individual voltage of each cell. Size:105.6x59x24.4mm(LxWxH) Weight:85g Input Voltage:5-12.6V (a separate battery is needed for powering this program box when ESC has no built-in/external BEC) Interface:TYPE-C USB, ESC interface(Futaba plug),Power supply interface(Futaba plug) Display Screen:LCD Colour:Black Material:ABS Package Contents: 1 set * setting cards programming box Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.