Image Sensor: 1/3” 1.3MP CMOS; Day/Night: Color Image; Audio Input: Omnidirectional Mic; Audio Output: Built-in Speaker, Bidirectional Talk: Support Dual-way Bidirectional talk; Door Control: 2; Alarm In: 2; RS485: 1; Tamper Switch: 1; Material: Stainless Steel; Power: DC 12Ven