Specification: _x005f_x000D_ Specification (optional) : ESP8266 Adapter, ESP-01 (black), ESP-01 (blue) _x005f_x000D_ Product size: 50 * 17 * 10mm/1.96 * 0.66 * 0.39inch _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Note: _x005f_x000D_ 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! _x005f_x000D_ Please allow 1-2cm measuring deviation due to manual measurement. _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Included: _x005f_x000D_ 1 x Adapter Board/ESP8266 Module 1. Stable Performance: The adapter board features a CH340 chip that ensures stable performance and excellent compatibility with Windows systems. 2. High-Quality Capacitor: With an integrated 1000uF solid-state capacitor, this adapter board guarantees a stable power supply, preventing the WIFI module from crashing or becoming unresponsive due to power issues. 3. Compact Design: This adapter board is compact and easy to carry, making it perfect for use on-the-go. 4. Reliable Oscillator: The 3225 patch oscillator enhances the stability of the serial port while providing a sleek and visually appealing design.