Arducam ESP8266 UNO Board for Arduino Mini Module Camera Shield Compatible with Arduino UNO R3 ESP8266 UNO based Arduino board for Arducam mini camera modules while keeping the same form of factors and pinout as the standard Arduino UNO R3 board Build in ESP8266-12E Module Interface specially designed for Arducam mini module camera shield with OV2640 2 megapixels lens (ASIN:B012UXNDOY) / OV5642 5 megapixels lens (ASIN:B013JUKZ48), not included 11 digital input/output pins, IO ports are 3.3V tolerant 1 analog input(3.2V max input)