Attention:1.Our sinks use large glass panels, if you receive the package and find it broken. You can feedback to us in time, we will send you a new one for free!2.The sink display and LED lights do not need external power supply, no batteries, rely on the internal water flow motor to generate electricityCommon Problems:1. The display and LED do not light up or glow, you can check the installation direction of the motor, whether it is correct or not, try to install it in the opposite phase2. There are white scratches on the edge of the sink, this is not due to wear and tear, but in the factory when spraying the bottom of the waterproof material stuck, you can try to scrape it off.3. If you dont know how to install, there is an instruction manual in our product package, besides that, we also prepared an installation video which is a YouTube link: https://youtu.be/SgQXb2TJo-w?si=q96iymLcFEKZ3nk-