The thingSoC Grovey ADC allows you to connect four (4) Analog sensors to either thingSoC or Mikrobus processors, like the thingSoC Teensy, PSoC4, ESP8266, or the ESP32.
The jumper in the bottom left-hand corner is used to select either 3.3 Volt or 5.0 Volt Sensors (shown in the 5.0 Volt position above).