Features: Designed for DIY intelligent home automation, the ESP01S relays Module enables wireless control of devices via androids app, featuring 10K pull up resistors and compatibility with 5V power inputs. Equipped with a 10A 250VAC relays, DC5V operational voltage, and preloaded LUA/APP source codes, this PCB based module supports seamless integration with IoT projects and intelligent switcher configurations. Ideal for electronics hobbyists, IoT developers, and makers seeking customizable WiFi controlled solutions for prototyping or home automation systems. Perfect for remotely managing lights, appliances, or industrial equipment through secure smartphone connectivity in residential or small scale commercial environments. Compatible for ESP8266 development boards, this module offers plug and play functionality for Raspberry enthusiasts while requiring basic programming skills for firmware customization. Specifications: Component: PCB Size:Approx.5x3cm/1.97x1.18inch, 3x2cm/1.18x0.79inch Option Type: relays Module with ESP01,relays Module without ESP01,ESP01S Module Package Includes: 1pc ESP01S WiFi relays Module note: Please allow 1-10mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.