WiFi module ESP-01 ESP8266 Black - 3 GPIO, 1MB, PCB antenna*
Wi-fi module based on the ESP8266 chip. Works in standard wi-fi 802.11 b/g/n at 2.4 GHz. Has 8 leads - pitch of 2.54 mm, of which 3 are GPIO. Has a 1 MB Flash memory, built-in LED and a PCB antenna. Tile sizes 24,8 x 16 mm.