SIM800A Kit Wireless Extension Module GSM GPRS STM32 Board with Antenna Versatile Audio Support: This module supports both digital and analog audio, making it ideal for a wide range of applications. It is compatible with HR, FR, EFR, and AMR speech coding, ensuring high-quality audio performance for your projects. Quad-Band GSM/GPRS Compatibility: The SIM800A module supports four frequency bands—850, 900, 1800, and 1900 MHz—allowing for global connectivity. Whether you're working on a local or international project, this module has you covered. Efficient GPRS Data Service: Enjoy reliable GPRS data service with a maximum data rate of 85.6 Kbps for downloads and 42.8 Kbps for uploads. This ensures efficient data transmission for your applications, whether you're sending or receiving information. Comprehensive Command Support: The module supports standard GSM07.07 and 07.05 AT commands, as well as Ai Thinker extension commands. This broad compatibility makes it easy to integrate into various systems and customize for specific needs. Automatic Power-On: Simplify your setup with the module's automatic power-on feature. It powers on without the need for a button or control boot, making it easy to operate and reducing the complexity of your project. Enhance your wireless communication projects with the SIM800A Kit Wireless Extension Module. Its robust features and ease of use make it an excellent choice for developers and engineers looking to integrate GSM/GPRS capabilities into their designs.