Video Intercom Master Station HikvisionDS-KM8301;Glasspanelandaluminum-alloy bracket; Supports live view ofdoor stationsandIPcamera; Supports remote unlocking doorfunction;Supportsvideointercom; Supports video intercombetweenmasterstations;Displayscreen: 7-Inch Colorful TFT LCD;CapacitiveTouchScreen, TouchKey,Physical Button; Display resolution:1024 × 600;Audioinput: Built-inOmnidirectional Microphone + ExternalHandset;Audiooutput: Built-inLoudspeaker + External Handset;Ethernet:10/100/1000MbpsSelf-AdaptiveEthernet; Working temperature: -10°C to +55°C;Dimensions (L × W × H)436 mm × 215 mm × 67 mm