Display: 7-inch TFT screen; Resolution: 1024 × 600; Audio Input: 1 channel all-direction microphone; Audio Output: Built-in 1.5W loudspeaker; Audio Mode: Support dual-way bidirectional talk; Sub-station Quantity: 9; Alarm Input: 6 channel (switch quantity); Alarm Output: 1 channel; SOS Alarm; Casing: PC+ABS; Power Supply: Standard PoE DC 12V 1A; Dimensions: 119.6 mm × 221.5 mm × 21.5 mm (4.71" × 8.72" × 0.85"); Storage: Support Micro SD, maximum memory capacity 32 G, standard memory capacity 8 Gen