The NETGEAR Arlo VMB4500 Security Base Station Device and Cameras Lot of 2 includes two surveillance cameras with a 4-inch screen size and a response time of 5ms. These wireless cameras are wall plug-in powered and feature a white color mode. They are compatible with Amazon Alexa for smart home integration and have a smart home protocol of Wi-Fi. The cameras are equipped with Wi-Fi connectivity and operate on indoor locations only. With a stylish design and advanced features such as IP/Network surveillance technology, this system provides reliable home surveillance with a high contrast ratio of 4000:1.