ITEM NAME:ESP8266 Remote Serial Port Module Send Receive IO Lead Out WiFi to ESP-201 C2E7 ESP8266 Remote Serial Port Module Send Receive IO Lead Out WiFi to ESP-201 C2E7 ESP8266 ESP-201 WiFi wireless transceiver module. It can be used as an IO module. All I lead out. With antenna, pistons far from the others. onboard IPX interface. Low consumption and less expensive. Material: CCL White color Package includes: 1 x ESP8266 ESP-291 module 1x Antenna Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..ESP8266 ESP-201 WiFi wireless transceiver module. It can be used as an IO module. onboard IPX interface. Low consumption and less expensive. All I lead out.