ITEM NAME:ESP8266 Serial WIFI Wireless Transceive Module Send Receive LWIP AP + STA f H2R8 ESP8266 Serial WIFI Wireless Transceive Module Send Receive LWIP AP + STA f H2R8 for Arduino compatible TE437 Size: 10 * 5 * 0.4cm / 3.94 * 1.97 * 0.16 inches Material: Metal Color: Black Package includes: 1 * Serial WIFI transceive module.Color: Black.