Using the Clear - Com PS - 22 power supply is easy. Just connect it to your two - channel intercom following the connection instructions. Make sure the power source you're using is stable and matches the power requirements of the device. When not in use, turn off the power supply to save energy. For maintenance, keep it in a dry and clean place. Regularly check the power cord for any signs of damage. If you notice any problems, stop using it immediately and contact customer service.