This Shure SLX4 wireless receiver operates on the J3 band with a frequency range of 572 - 596 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 to use in certain countries.

Using this Shure SLX4 wireless receiver is easy. First, connect it to a compatible audio device. Since it doesn't come with a power supply, you'll need to use your own suitable power source. Also, you'll have to attach your own antennas for better signal reception. When it comes to maintenance, keep it in a dry and clean place. Avoid exposing it to extreme temperatures or moisture. And always check your country's wireless frequency laws to ensure you're using it legally.