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. 5.The scope of application here can also be understood as all the escs that the old LCD G2 program box and OTA Bluetooth module can support. Colour:Black Material:ABS Package Contents: 1X Multifunction LCD Program Box 1X USB charging cable 1X cable 1X English manual 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.