Synology Expansion Unit (Rack 1U) for RS818+, RS818RP+, RS816, RS815+, RS815RP+,...
Synology Expansion Unit (Rack 1U) for RS818+, RS818RP+, RS816, RS815+, RS815RP+, RS815, RS820+, RS820RP+,RS1219+,RS819 up to 4hot plug HDDs SATA(3,5` or 2,5`)/1xPS incl eSATA Cbl