this module originates from Mainland China, ensuring quality and reliability in each unit produced. Advanced GPS Technology: The BG-231 model is equipped with sophisticated GPS receiver and antenna technology, designed to enhance the accuracy and reliability of location tracking and navigation solutions. Innovative Communication Capabilities: Utilizing 433MHz LoRa spread spectrum technology, the module offers efficient point-to-multi wireless two-way data transmission, ideal for various communication and tracking applications. Safe and Eco-Friendly Design: Committed to environmental safety, the BG-231 module is free from high-concern chemicals, making it a safer choice for users and the planet. Versatile and Transparent Transmission: This DTU (Data Transmission Unit) supports transparent transmission, allowing for seamless data communication without altering the content, making it versatile for a wide range of applications. Specifications: Name: Video and Data Transmission Module Dimensions: 87.5*56.4*13.5mm Model: BG-231 Operating Frequency: 2401.5-2481.5MHz, 1427.9-1447.9MHz, 806-826 MHz RF Channels: Supports single transmit and dual receive (1T2R) Transmission Method: Supports unicast, multicast, and broadcast (The product printed words may vary depending on the batch, but this does not affect use) Includes list: Color: Black Material: Plastic+Metal Package Contents: 1*Data Transmission Radio Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.