This Shure SLX4 wireless receiver operates in the L4 band (638 - 662 MHz). Note that it doesn't come with a power supply or antennas. Before buying, make sure to check your country's wireless frequency regulations as some frequency ranges may be illegal in certain countries.

Using this Shure SLX4 wireless receiver is easy. First, you'll need to get a compatible power supply as it's not included. Connect the receiver to your audio system. Remember to check your country's rules about using this frequency range before using it. When it comes to maintenance, keep it in a dry and clean place. Avoid exposing it to extreme temperatures. If you're not using it for a long time, store it properly. And always handle it gently to prevent any damage.