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