PRODUCT FEATURES:- For Use with Dahua NVRs and HDCVI DVRs- Designed for 24/7 Surveillance-optimized Hard Drive Applications - Firmware Optimized for Continuous Recording; 90% Write and 10% Read - Engineered for Workloads up to 180 TB/year - Low Power Consumption and Startup Current - Tarnish-resistant Components to Minimize Environmental Effects