Specification: Specifications: HW-573B (CP2102 module), HW-573C (CH9102X) (optional) Power supply voltage: DC 5V Packaging size: about 105mm * 70mm * 10mm/4.13inch * 2.75inch * 0.39inch Packaging weight: 12g Micro USB power supply Wireless network and Bluetooth-compatible Extract 38 module pins from the board Supports I2C, SPI, and UART communication protocols WIFI working mode: 802.11 B/g/N/E/I Wireless internet frequency: 2.4 GHz Low power consumption, high stability, and strong universality Support WPA/WPA2/WPA2 Enterprise/WPS Encryption Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. Included: 1 x Development Board 1. Module-based Design: NodeMCU-32S is a core development board designed based on module and inherits the classic design of NodeMCU 1.0, making it versatile for various applications. 2. Versatile Connectivity: The board features a variety of I/O pins that can be connected to external peripherals according to developers' needs, enabling flexible and customizable designs. 3. Easy to Use: With standard headers on both sides, using a breadboard for development and debugging becomes more straightforward and convenient. 4. Low Power Consumption and High Stability: The development board has low power consumption and high stability, making it suitable for long-term use in various applications.