Operating environment Temperature 5-35 ° C, humidity 20-80 % * No condensation Exchange HDD OP-HDWH Series [USB part] Interface USB 3.1 (GEN 1)/3.0/2.0 Number of terminals 1 terminal shape Type-B Bus Power non -support Mounting drive 18TB x 4 Drive [Built -in] Interface Serial ATAⅡ Number of terminals 4 ports (HD connection already) Data transfer speed 3.0Gbps (theoretical value) Compatible mode RAID 5/10/1/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0ening of normal mode, spanning * It is set to RAID5 when shipping. Power AC100V 50/60Hz Maximum power consumption 90W Energy consumption efficiency (revised in April 2011) N category 0.00063 External dimensions (width x height x depth) 177 x 127.5 x 227mm * Only the main body (excluding protrusion) Mass about 5.5kg Green purchase method (revised in April 2011) Response ROHS standard value Response Main accessories USB 3.1 (GEN 1) cable (A to B 1m), AC adapter, instruction manual, warranty