• The all-new Blink Video Doorbell+Outdoor 4 Wireless smart security system features LED LCD display technology with a response time of 1ms. It is powered by a battery and has a voltage of 3V, with an operating range of 6m to 9m. This system includes one camera with a maximum resolution of 1920x1080 and is compatible with Amazon Alexa for smart home integration. With advanced IP/Network surveillance technology, this unit offers color day and B&W night video feed, making it an ideal choice for outdoor use with a weatherproof design. The system also has a storage capacity of 250GB and a 1-year manufacturer warranty.