The Ai-Thinker ESP-01 WIFI Module RoHS is a simple, low-cost Wi-Fi enabled electronic component designed for use in electronic projects and devices. The module operates on an IEEE802.11 b/g/n network and can take input from an external antenna. It has an integrated processor, memory, and radio transceiver, and is compatible with the ESP8266 Wi-Fi module. Furthermore, the ESP-01 is capable of providing simultaneous connections to up to 4 devices, making it suitable for a variety of projects. As a result, it is often used in the development of robotics, home automation, and even Internet of Things (IoT) applications. The unit is RoHS compliant, making it safe for use in commercial and industrial settings, and is backed by a 2-year warranty.