The NF-01-S with Wireless Modules Module RoHS (NF-01-S) is a mini wireless communication module manufactured by Ai-Thinker. The module is based on their ESP8266 low-cost Wi-Fi chip, and is designed for low-power, low-cost applications. It supports both 2.4GHz Wi-Fi and Bluetooth communication, and can be used for a variety of wireless communication applications. The integrated antenna can provide maximum transmission distance of up to 150 meters, and its low power consumption also allows for extended battery life. The module also complies with the RoHS directive, meaning it is compliant with European environmental regulations.