The RX500-4 with Wireless Modules RX500 RoHS, manufactured by Velex, is a compact four-channel, low power radio receiver that is compatible with most 2.4GHz protocols in the market, such as Wi-Fi, Bluetooth, Zigbee, LoRA, and others. It has an integrated SAW filter and can receive up to four channels simultaneously, allowing for the design of sophisticated wireless systems with minimal effort. With its modular design, it can be configured to meet the needs of various applications and provide users with secure, reliable connections. The device is designed to meet the requirements of Radio Equipment Directive (RED), and it is RoHS compliant for use in applications with a focus on compatibility and safety.