Using the Daichi Piezo Horn Tweeter Speaker is a breeze. First, find a suitable location for it in your PA system or wherever you plan to use it. Make sure the mounting area matches the 85mm diagonal size. Connect it according to the standard audio connection procedures. When using, keep in mind that it can handle a maximum power of 100W, so don't exceed this limit to avoid damage. As for frequency, it works well between 2KHz and 25KHz, so set your audio source within this range for the best sound. For maintenance, keep it clean by gently dusting it off regularly. Avoid exposing it to extreme temperatures or moisture, as this can affect its performance. If you have any issues, you can rely on our 25 - year - long experience in supplying parts for assistance.