Dual-way 7 Inch Hikvision Video Door Bell

Display Screen: 7-Inch Colorful TFT LCD; Indoor Display Resolution: 800 × 480, Indoor & Door Station Audio Input Built-in Omnidirectional Microphone; Indoor & Door Station Audio Output 4 Four-Wire Interfaces (1-ch Video Input, 1-ch Audio Input/Output, 1-ch Power Supply, 1-ch Grounding in 1 Four-Wire Interface) 7-Inch Colorful TFT LCD