This downloader is for modules such as ESP-12S/ESP-12F/ESP-12E/ESP-07/ESP-07S. When the programming button is pressed, the blue programming indicator will light and the IOQ pin of the ESP8266 module will be pulled low. Support one-click firmware download function. Safe and reliable, small size, long service life. And has power indicator light, burning indicator light, serial port communication indicator light. Lead out all IO ports, which can be used as the smallest system development board or fixture for small batch programming. Different batches, the appearance of the product may differ. Colour: black Material: PCB + metal Package Contents: 1 * ESP32WROVER Development Board Only the above package content, other products are not included. Note: Light 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.