Using these Edifier R1280DB speakers is a breeze. First, connect the speakers to your power source. Then, you can use the included cables to connect your devices. For audio sources, you can use the RCA inputs, optical, coaxial, or Bluetooth. The side-mounted rotary controls make it easy to adjust the volume, bass, and treble. You can also use the wireless remote to switch between inputs and control Bluetooth - connected devices. Remember, these are open - box items, so the packaging might be damaged, and all sales are final. When it comes to maintenance, keep the speakers in a dry and clean place. You can remove the grills for cleaning if needed. Make sure to turn off the speakers when not in use to save energy and extend their lifespan.