Seagate 4TB SkyHawk Surveillance HDD, SATA III, 256MB, Surveillance Optimized, NVR Ready Design, ImagePerfect Firmware, Rotational Vibration Sensors Specifications: - HDD size: 3.5´´ - HDD capacity: 4000 GB - Interface: Serial ATA III - Type: HDD - Component for: PC - Storage drive buffer size: 256 MB - HDD interface transfer rate: 6 Gbit/s - HDD sustained transfer rate: 180 MiB/s - 24/7 operation: Yes - RV sensor(s): Yes - Maximum number of cameras supported: 64 - Start/stop cycles: 600000 - Mean time between failures (MTBF): 1000000 h Power: - Power consumption (standby): 0.25 W - Power consumption (read): 3.7 W - Power consumption (write): 3.7 W - Power consumption (idle): 2.5 W - Operating voltage: 5 / 12 V - Start-up current: 1.8 A Operational conditions: - Operating temperature (T-T): 0 - 65 °C Weight & dimensions: - Width: 101.8 mm - Height: 20.2 mm - Depth: 147 mm - Weight: 490 g