Before buying, make sure to check your country's wireless frequency rules. Some frequency ranges are not allowed in certain countries. This product comes with the right power supply.

Using this Shure PA821A Antenna Combiner is easy. First, ensure you've checked your country's wireless frequency laws to avoid any legal issues. Then, connect it to your PSM wireless system. It works well in the 470 - 952 MHz range. Keep in mind that the power supply it comes with is the correct one for it. For maintenance, keep it in a dry and clean place. Avoid exposing it to extreme temperatures or humidity. If you notice any problems, contact the customer service for help.