The R900M is an optimized Wi-Fi solution for IoT devices. It operates in the 902MHz-928MHz frequency band. Under the same transmission power as 2.4GHz/5GHz Wi-Fi, this product can achieve a transmission distance of up to 1.2 kilometers. The enhanced version increases the power to 33dBm/2W, enabling a ground open-space distance of over 5 kilometers and an air-to-ground distance of over 30 kilometers. The enhanced bridge supports channel widths of 1/2/4/8MHz, providing physical layer symbol rates from 150 Kbps to 32.5 Mbps, suitable for applications ranging from low-rate sensors to multi-channel high-rate surveillance cameras. It supports relay mode to extend coverage and roaming mode, allowing STAs to roam between different APs. The module also supports multicast mode, making it ideal for data multicast scenarios.