The 4-channel DVR manages and can record from up to 4 cameras. It comes with a 1TB HDD preinstalled. HDD capacity is expandable to 4TB if more storage space is required. H.264 video compression reduces bandwidth requirements for efficient data storage while maintaining the best possible video quality. An audio input and output enable two-way audio communication. Remote access via an iOS or Android device and Windows or Mac PCs is possible thanks to the free FLIR Cloud apps. The included 2.1MP MPX multi-format dome cameras have a 1/2.7 inch progressive scan CMOS sensor to transmit 1920 x 1080 resolution video up to 30 fps. They have a 3.6mm fixed lens to deliver an 80° horizontal field of view. IR LEDs provide up to 80 ft of night vision. The cameras are housed in an IP66-rated aluminum alloy enclosure that is suitable for outdoor use.