Specification: _x005f_x000D_ Origin: Mainland China _x005f_x000D_ Model Number: Pulse Generator Module _x005f_x000D_ Working voltage: 5-12V _x005f_x000D_ Board size: 29mmx12mm/1.14inchx0.47inch _x005f_x000D_ Product weight: 2g _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 Module 1. Built with NE555 Chip: This module is equipped with a reliable NE555 chip that ensures stable performance and easy integration into your circuit design. 2. Single-channel Signal Output: The NE555 module outputs a square wave signal with a duty cycle of about 50%, making it ideal for use in various electronic projects. 3. Adjustable Frequency: The pulse generator module has an onboard adjustable resistor that allows you to tune the frequency of the output signal by simply adjusting the resistance value. 4. Power Indicator Light: The frequency adjustable module comes with a power indicator that lights up when connected to a power source, making it easy to verify whether the module is working properly.