1. Type: logic ICs 2. Supply voltage: 6-9V recommended 3. MCU: ATmega328 4. WiFi MCU: ESP8266 5. USB converter: CH340G 6. Pin output Un: Un R3 7. UN +WiFi R3 ATmega328P+ESP8266 (32Mb memory), USB-TTL CH340G; Compatible with Ar Un, NodeMCU, WeMos ESP8266 8. Weight: about 21.6 g 9. Size: about 6.9 x 5.3 cm
