Compact Design: The mini port design makes it portable and easy to integrate into any setup without taking up much space. Easy Installation: Features a plug-and-play interface that simplifies the setup process, allowing for immediate use upon connection without the need for additional drivers. Usage Instructions: 1. Short-circuit TXD and RXD on the USB TTL module. 2. For hardware flow control testing, follow the recommended wiring diagram. 3. Connect the module to a computer using a USB cable. Open a serial port terminal application and select the correct COM port. 4. Send data via the terminal and verify successful loopback by checking if the received data matches the transmitted data. Color: As shown in image Material: PCB Note: Slight variations in appearance or color may occur between production batches. These differences do not affect functionality. Package Includes: 1 × FT232RL USB TTL Serial Module Note: Light reflection and display settings may cause slight color variation between the image and the actual product. Dimensions are subject to a tolerance of ±1–3 cm.