Do not purchase from the seller. The ESP32-CAM-MB module is faulty, will flash inconsistently and even when flashed, code fails to execute correctly, no output to serial console. Even with the ESP32 directly connected to a FTDI USB interface, bypassing the MB module, still does not work. Attempt refund, but the seller is playing games, demanding all types of proof, even after saying they agree to refund, they are a moving target, offered a partial refund only.