Display: 7" TFT, Capacitive touch screen; Screen Resolution: 1024 × 600; Audio Input: 1; Audio Output: Built-in speaker; Audio Mode: Two-way audio; Number of Extension: Villa: 10; apartment: 6; Storage: Micro SD card (up to 64 GB); Casing: PC + ABS; Alarm Input: 6; Alarm Output: 1; Door Bell: Yes (use any alarm input port); Power Supply: 12V DC 1A Standard PoE; Dimensions: 189.0 mm × 130.0 mm × 26.9 mm (7.44" × 5.12" × 1.06")en