HI3520:
DS-7204HVI-SV
DS-7204HWI-SH
DS-7304HFI-SH
DS-7304HWI-SH

HI3521:
DS-7208HVI-SV
DS-7208HFI-SH
DS-7208HWI-SH
DS-7216HVI-SV
DS-7308HFI-SH
DS-7308HWI-SH

HI3531: 
DS-7216HFI-SH
DS-7216HWI-SH
DS-7316HFI-SH
DS-7316HWI-SH