The DS-7732NXI-I4/S(C) is part of Hikvisions Acusense I series NVR's with Dual Lan Ports. Designed for medium sized businesses, this unit also offers 4x HDD bays for internal storage. The DS-7732NXI-I4/S is equipped with Dual Lan Inputs so you wire 1x Lan port to the Network for remote access and use the 2nd Lan port for a PoE Switch (Sold seperately) to which you input your cameras, the NVR can accept up to 12 Megapixel recording, The DS-7732NXI-I4-S has 256mb Bandwith available this allows a maximum of 8mb per channel if 32 cameras are in use. The new Hikvision I series support H.264, H.264+ & H.265 Decoding capability, 4K televisions and cameras up to 12MP.