5 piece set of ESP8266 ESP07 WiFi remote model serial port wireless transceiver modules 2.4 GHz wireless operation provides stable communication between devices 3.3V power supply compatible with Arduino projects ESP-07 module offers convenient serial port connectivity for easy integration Ideal for creating wireless applications and remote control functions using Arduino Use scenarios - Home automation and sensor networks: connect sensors such as temperature or humidity to an Arduino and transmit data over WiFi to a central controller or cloud service - Wireless remote control: operate lights, actuators, or other devices from a microcontroller network without hard wiring - IoT data logging and monitoring: collect sensor data with Arduino and send updates to a server or cloud for monitoring and analysis Package advantages - Five modules per pack for multiple projects, replacements, or spare units - Simple serial port based integration with existing microcontroller projects - Stable 2.4 GHz wireless link suitable for short to medium range wireless applications