4-in-1 External Expansion Board – 2.8 Screen, 433MHz RF, ESP32-S2 & GPS Module. Expand the capabilities of your compatible handheld device with this 4-in-1 External Expansion Board. The module combines a 2.8-inch display, 433MHz RF module, ESP32-S2 module, and GPS module in one integrated expansion solution. With an 800mAh battery and USB connectivity, this expansion board is designed for users who want additional hardware features in a compact external module. The board supports firmware burning through USB and is designed for customized use. Product Type: 4-in-1 External Expansion Board. Display: 2.8-Inch Screen. Firmware Burning: Supported via USB. GPS Sharing: Supports GPS sharing between compatible devices and the external module. Antenna: 2.4GHz 3dBi, GPS 20dBi, 433MHz 3dBi. This external expansion module combines four main components. The integrated design provides multiple hardware functions in a single expansion board, making it suitable for electronics enthusiasts, hobbyists, and developers working with compatible hardware platforms. The GPS module can be shared between compatible host devices and the external expansion module. The system supports selecting the GPS power source according to the connected setup. The ESP32-S2 module is designed for compatible wireless development and experimental applications. Signal pins include TVS protection for added circuit protection. USB & Firmware Support. The expansion board supports USB connectivity and firmware burning, allowing users to configure and update compatible firmware according to their setup. 2.4GHz Antenna: 3dBi. Production Cycle: Approximately 10-15 Days. This is an external expansion module intended for compatible hardware and development projects. Please verify compatibility with your specific device, firmware, and software before ordering. Functionality may depend on the connected hardware and supported firmware. The product does not include any host device unless specifically stated in the selected listing option.