The ESP-WROOM-02(4MB) with WIFI Modules Module RoHS is a Wi-Fi module manufactured by Espressif Systems. It is based on the popular ESP8266 chip and supports up to 4MB Flash memory for program storage. It is designed for embedded applications and features low power operation, integrated RF transceiver and a rich set of features including integrated TCP/IP protocol stack, a wide range of internet protocols, and multiple GPIO out pins. The module is RoHS compliant and is certified by the FCC for wireless applications. It is extremely easy to use and is ideal for creating connected applications with minimal time and effort.