The DL-RTS4438-433M with Wireless Modules Module RoHS manufactured by DreamLNK is a low-power, cost-effective wireless module designed for 433MHz frequency band communication. It is compatible with the DL-RTS-4438-ST and DL-RTS-4438-LC chipset. The module is RoHS compliant and includes integrated radio front ends and channel filter. It also has onboard power amplifier, receive signal strength indicator, analog/digital selectable receiver output, adjustable receiver baseband filter, and programmable transmitter power. The module supports up to 128 channels, making it an ideal solution for multiple applications. The DL-RTS4438-433M is a great product for data radio applications that require a secure, reliable, and low-cost communication system.