EverFocus ECOR264-4F2 1TB. Video compression formats: H.264, Playback resolutions supported: 800x600, 1280x1024, Analog signal format system: NTSC, PAL. Hard drive interface: Serial ATA, Hard drive capacity: 1000 GB. Compatible operating systems: Linux. Power requirements: 110-240V AC / 12V DC. Operating temperature range (T-T): 0 - 40 °C, Operating relative humidity range: 20 - 80 %