“SOS-16-2X 1080P 16CH AHD TRI BAND DVR” is a useful choice for your home or office. Supported AHD/ANALOG/IP Camera ONVIF enable and free mobile & laptop software for any time surveillance. This unit supports 2 SATA HDD up to 4TB. Its premium grade construction ensures reliable usage. Mobile Software: XMEYE. Dimension 250.00mm x 220.00mm x 40.00mm & Weight 0.78KG.