Turbo HD DVRs 4 Channel DVR 8 Channel DVR 16 Channel DVR 32 Channel DVR DS-7104HGHI-K1 DS-7104HQHI-K1 (S) iDS-7104HQHI-M1/S DS-7104HUHI-K1 (S) DS-7204HUHI-K1/E (S) DS-E04HGHI-B DS-E04HQHI-B IDS-7204HQHI-M1/FA IDS-7204HUHI-M1/FA