The Blink Outdoor 4 - 3 Camera System is a high-quality outdoor surveillance system that offers 4 channels of monitoring with Smart Home compatibility with Amazon Alexa. The system features LED LCD display technology, a 1ms response time, and a maximum resolution of 1920x1080. With features such as outdoor/weatherproof design, programmable settings, night vision capability, and motion tracking, this system provides reliable security monitoring for your outdoor spaces. The 4 cameras included in the package offer a wide operating range of 5-9 meters and are powered by rechargeable batteries with a battery backup for added convenience.