Using this water faucet is easy. Just place your hands under the sensor, and the water will flow out automatically. You can choose between battery or AC power according to your needs. When using the AC plug-in, make sure the power supply is stable. Keep the faucet clean by wiping it regularly with a soft cloth. Avoid using abrasive cleaners as they may damage the polished finish. If there is a problem with the sensor, check the battery (if using battery power) or the power connection (if using AC power).