Welcome to our shop! The USB to GSM serial port module is designed to be easy to use and operate. Simply plug it into your computer for debugging. It allows for the transmission of voice, SMS information, and data information with low power consumption, making it suitable for various compact product design requirements. This module has excellent contact performance, ensuring stable operation. It is small in size and lightweight, making it portable and easy to carry. The high-quality material used ensures the durability and stability of the product. Material: PCB Working Voltage: DC 5V Purpose: Can realize the transmission of voice, SMS information, and data information with low power consumption, and can be suitable for various compact product design requirements. Quantity: 1 x Module 100% Satisfaction: Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactory after-sales service.