1、The module uses USB and serial port to communicate with the outside world. It is convenient to connect the module with PC and MCU. 2、Precise cutting and interface ensure perfect applicability. Suitable for installation position, easy to install. 3、The product uses high quality materials. It effectively avoids corrosion and wear and is durable. 4、Professional chipset provides excellent performance in the system. 5、Easy to operate, anti-aging, and prolong service life. Features: 1. The module uses USB and serial port to communicate with the outside world. It is convenient to connect the module with PC and MCU. 2. Precise cutting and interface ensure perfect applicability. Suitable for installation position, easy to install. 3. The product uses high quality materials. It effectively avoids corrosion and wear and is durable. 4. Professional chipset provides excellent performance in the system. 5. Easy to operate, anti-aging, and prolong service life. Specifications: Model: HW-034 All 3 modules are equipped with MICRO USB and TTL level serial interface. MICRO USB: Standard micro USB female port, which can communicate directly with other devices such as PC through USB extension cable. TX: serial interface sender. RX: serial interface receiver. 5V: Positive power supply. GND: One end of the cable that is grounded Size: Approx. 10* 4.5* 1.5cm/ 3.94* 1.77* 0.59inch Package List: 1 * Module