FEATURES HDD Size 3.5" HDD Capacity 4000 GB Interface Serial ATA III HDD Model Intended Use PC Memory Disk Buffer Size 256 MB HDD Interface Bit Rate 6 Gbit/s HDD Maintain Bit Rate 180 MiB/s Operation 24/7 Yes RV Sensor(s) Yes Maximum Supported Cameras 64 Start/Stop Cycles 600000 MTBF (Mean Time Between Failures) 1000000 h POWER Standby Power Consumption 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 Initial Current 1.8 A OPERATING CONDITIONS Temperature Range (Operation) 0 - 65 °C WEIGHT AND DIMENSIONS Product Width 101.8 mm Product Height 20.2 mm Product depth 147 mm Product weight 490 g