The 4K SolarCam P1 Max with aosuCortex System is a cutting-edge surveillance camera that includes 4 cameras for comprehensive home security. Powered by solar energy, these color cameras offer a high resolution of 16:9 and feature night vision capabilities. With built-in 32 GB storage capacity and the option to expand to 16 TB, these cameras ensure clear and detailed footage. Compatible with Amazon Alexa and Google Assistant for smart home integration, these wireless cameras provide reliable security monitoring with Wi-Fi connectivity. Perfect for modern homeowners looking for a reliable and sustainable surveillance solution. This is an open box and was opened to pair one of the cameras to the home base to verify performance. It paired rather easily. Decided once we purchased we didn't need them. Aosu has a nice website that will give you all the details you need.