Let's take a moment to talk about the CM421 2.4G 4CH Full-Range DSM2 Compatible Receiver from REDCON.
This receiver is designed to work with a variety of radio transmitters and operates on the 2.4GHz band with four channels. Its compatibility with DSM2 technology makes it a valuable addition to any radio system.

One of the most impressive features of the CM421 is its compatibility with a range of radio transmitters including older models like the Futaba 9c. Its small size and light weight make it ideal for use in foam planes and other small aircraft. The in-line servo connectors also make it a great choice for narrow fuselages. Additionally, the CM421 has been praised for its good range, making it an excellent choice for DLG planes. Overall, the CM421 is a versatile and reliable receiver that delivers excellent performance.

In terms of its advantages the CM421 is highly compatible with a variety of radio transmitters and has a good range, making it a reliable choice for hobbyists. Its small size and in-line servo connectors make it a great option for use in narrow fuselages and foam planes. However, some users have reported difficulty in binding the CM421 with certain Spektrum transmitters, and others have noted that it doesn't work with the Surface Tx DX5 rugged. Despite these issues the CM421 remains a solid choice for those in need of a versatile and reliable receiver.

If you're in the market for a reliable and versatile receiver the CM421 2.4G 4CH Full-Range DSM2 Compatible Receiver from REDCON should definitely be on your list. With its compatibility with a variety of radio transmitters, small size, and good range, it's a great choice for hobbyists and professionals alike. While it may not work with all transmitters the CM421's strengths far outweigh any potential drawbacks. Overall, this is a well-designed and effective receiver that delivers excellent performance.