Melife 4Pcs ESP8266 ESP01 Serial WiFi Module Wireless Module Development Transceiver Board 33V for Arduino

ESP8266 is a highly integrated chip designed for the needs of a new connected world. It offers a complete and self-contained Wi-Fi networking solution, allowing it to either host the application or to offload all Wi-Fi networking functions from another application processor. Specifications: Serial/UART baud rate: 115200 bps Input power: 3.3V I/O voltage tolerance: 3.6V Max Flash Memory Size: 1MB (8Mbit) WiFi security modes: WPA, WPA2 Package Including 4 * ESP8266 Wifi Transceiver Module