QNAP 60W external power adaptor for 3.5- inch 2 Bay & 2.5-inch 2 Bay NAS HS-251, TS-251, HS-210, TS-212P, TS-220, TS-221, TS-219P, TS-219P+, TS-210, SS-439,N MP-1000P, TS-231, TS-231+