Features: Seamlessly integrates built in ESP12E WiFi module for wireless connectivity and projects, featuring GPIO expansion pins for sensors/actuators and programming support. Equipped with ESP12E's 802.11 b/g/n WiFi, /UDP stack, and compatibility, this compact ABS+PCB development board enables flexible prototyping via USB/external power and AT command control. Designed for electronics enthusiasts, developers, and educators needing wireless compatible boards to build smart home systems, robotics, or interactive learning tools. Ideal for creating WiFi connectivity automation projects,networks, or prototypes in workshops, classrooms, or handmade environments requiring stable wireless data transmission. Combines 's GPIO versatility with 's WiFi functionality, offering socket communication for cloud integration and space efficient design for embedded electronics applications. = Specifications: Component: Plastic Size: Approx.68x53x18.2mm/2.67x2.08x0.71inch Weight: 30g. Output voltages: 3.3V. Package Includes: 1x WiFi Expansion Board note: Due to the problems of lighting effects, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.