DAHUA VTH5421HB-W Video Intercom Monitor Key Features 7-inch TFT capacitive touch screen. 6-channel alarm input and 1-channel alarm output. Support standard PoE. 2.5D screen glass. Technical Specifications System; Main Processor Embedded CPU; Operating System Embedded Linux operating system; Interoperability ONVIF compliance; Network Protocol SIPP; Protocol IPv4; RTSP; RTP Rate; TCP; UDP; Basic; Screen Type Capacitive Touch Screen; Display 7-inch TFT; Screen Resolution 1024x600; Audio Compression G.711a; G.711Mu; G.711u; PCM; Audio Input 1; Audio Output Built-in speaker; Audio Mode Two-way audio; Audio Enhancement Echo Cancellation; Audio Bit Rate 16KHz, 16bit; Function; Communication Mode Fully digital; Press Release Receiving and displaying text information issued by the management center (After installing an SD card, it can receive and display image information).; Leave Videos Yes (Insert the SD card into the indoor monitor); DND Mode DND period and DND mode can be set.; Number of Internal Numbers Villa: 10; Apartments: 6; Storage Micro SD card (up to 64GB); Performance; Housing Computer + ABS; Port; RS-485 Connector 1; Alarm Input 6; Alarm Output 1; Power Output 1 (12V/100mA); Doorbell Yes (Use any alarm input port); Network One 10Mbps/100Mbps Ethernet port; General; Color Black or white; Power Supply 12V DC 1A; Standard PoE; Power Adapter Not Included; Installation Surface mounting; Certifications CE; FCC; UL; Accessories Alarm bracket and strap (included); Dimensions 189.0mm x 130.0mm x 26.9mm; (7.44" x 5.12" x 1.06"); Temperature -10°C to +55°C (+14°F to 131°F); Humidity 20% to 93% (non-condensing); Operating altitude Less than 3000 m (9842.52 ft); Consumption Standby 2W; Operating 6W; Net weight 384 g (0.85 lb); Gross weight 737 g (1.62 lb);.