Compatible model HD -WHU3/R1 series Inter-Face Serialata 3.0 SPECIFICATION compliance Disk medium 3.5 type Operate voltage 5V ± 5 %, 12V ± 10 % (supply from the main unit) Energy consumption efficiency (revised in April 2011) OP-HD4.0wh C category 0.0018 OP-HD3.0WH C category 0.0031 OP-HD2.0wh C category 0.0036 * Energy consumption efficiency is a power consumption measured by the measurement method specified by the energy saving method, by the storage capacity specified by the energy saving method . External dimensions (width x height x depth) * Only the main body (excluding protrusions) 102 x 27 x 147mm Approximately 740g Synopetic environment -compatible products Green purchase method (revised in April 2011) OP-HD4.0wh Response OP-HD3.0WH Response OP-HD2.0wh Response ROHS Directors Society of Directors Main accessory instruction manual * The warranty card is described in the package