Description Thank you for visiting our product page! We strive to provide you with an effortless shopping experience. Our checkout process is simple and offers various shipping options with tracking. Furthermore, we believe in maximizing the value of your purchase. On this website, you can find detailed instructions on how to use this product and explore various projects we have created using it. These resources are designed to help you make the most of your purchase. How to use this product — Click on me Free projects and tutorials — Click on me If you have any questions or encounter any issues, our dedicated customer support team is always ready to assist you. Please don’t hesitate to reach out to us through our user-friendly Contact Us page. We are committed to ensuring your complete satisfaction. Lastly, we highly value your feedback. Once you have experienced our product, we would greatly appreciate it if you could leave a review. Your opinion matters to us! Thank you for considering our product. We look forward to serving you. Product details Chip: SIM800L Voltage: 3.7-4.2V Support networks: China Mobile, China Unicom, and global quad-band network Module size: 2.5cmx2.3cm TTL serial port for serial port you can link directly to the microcontroller. No need MAX232 Power module to automatically boot, homing network Onboard signal lights all the way. It flashes slowly when there is a signal, it flashes quickly when there is no signal
