IP Wireless Video Door Phone hands free video intercom communication support monitoring the door station and the external analog camera remote unlocking convenient installation 7 inch colorful TFT Display Parameters Display Screen: - 7-Inch Colorful TFT LCD Display Resolution: - 800 × 480 Operation Method: - Physical Button Audio Parameters Audio Input: - Built-in Omnidirectional Microphone Audio Output: - Built-in Loudspeaker Audio Compression Rate: - 64 Kbps Audio Quality: - Noise Suppression and Echo Cancellation Device Interfaces Four-wire Interface: - 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) General Power Supply: - 12 VDC Power Consumption: - ≤5 W Working Temperature: - -10° C to + 55° C (14° F to 131° F). Door Station/Audio Parameters Audio Input: Built-in Omnidirectional MicrophoneAudio Output: Built-in LoudspeakerAudio Quality: Noise Suppression and Echo Cancellation Door Station/Device InterfacesFour-Wire Interface1 Four-Wire Interface (1-ch Video Input, 1-ch Audio Input/Output, 1-ch Power Supply, 1-ch Grounding) IO Output1 Relay Output The video door bell transcends all forms of modern technology for its operation. It is very easy to operate. Indoor Station Features IP WIRELSS VIDEO DOOR PHONE Hands-free video intercom communication Support monitoring the door station and the external analog camera Remote unlocking Convenient installation Screen: 7-Inch Colorful TFT LCD General Power Supply: 12 VDC Power Consumption Display Resolution: 800 × 480 Door Station Features Self-adaptive IR supplement One-touch calling Pinhole Camera with 720 x 576 @ 25fps Unlocking controlling