This is a simple ESP32-S3 board: a 9V battery holder feeds an AMS1117-3.3 regulator, which is intended to create a 3.3V rail for the ESP32-S3-WROOM-1 module. The ESP32 drives a red LED through R1 = 220Ω from IO15, so firmware can turn the LED on/off.

Important concern: the regulator output U3:VO is currently on its own net and does not connect to the ESP32 3V3 net, so as drawn the ESP32 is not actually powered by the regulator output.