This Eartec PRO2000 COMSTAR full duplex wireless base station doesn't come with a power supply or a battery. It has only been power - tested.

To use this Eartec PRO2000 COMSTAR base station, you'll need to get your own power supply and battery as they aren't included. First, connect the power supply to the base station and plug it into a power outlet. Then insert the battery if it requires one. When using it, keep it in a dry and cool place to avoid overheating. After each use, turn it off properly. For maintenance, clean the exterior of the base station with a soft, dry cloth regularly. Don't use any harsh chemicals or abrasive materials as they might damage the device.