Blue3D(TM)Black Edition Esp8266 Esp-01 Serial Wifi Wireless Transceiver Module - Arduino Compatible Ai-cloud Increased Flash Add WiFi capabilities to your Arduino or other microcontroller project WiFi serial transceiver module, based on ESP8266 SoC Integrated TCP/IP protocol stack. 802.11 b/g/n, SDIO 1.1/2.0, SPI, UART, Wi-Fi Direct (P2P), soft-AP Increased 1MB of Flash Memory compared to the blue model! Manufactured and Quality Assured by Blue3D(TM), the only authorized seller of this product.