Support STC official website to update and download software. Support STC MCU 3V or 5V MCU series models, online programming. Support direct external USB online burning with computer. After downloading offline files on the computer, you can leave the computer to burn offline online. Protective function:TVS electrostatic protection, voltage surge protection IO port level conversion isolation measures, no streaking Hardware protection: prevent large capacitance, pull down the computer USB power supply or external power supply Reverse insertion protection: After the software detects the reverse insertion, it will automatically cut off the power supply, and the flashing light will indicate reverse insertion or short circuit. Acrylic sheet: Bottom and top plate protection Special note: Offline download supports continuous power supply after downloading (the board has button settings, and the settings are saved when power off) Due to different product batches, the appearance may vary, which does not affect the use Colour:As Shown Material:plastic Package Contents: 1 x burn and write programmer Kit 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.