The coupler is used in conjunction with a compatible adapter allows you to power your Digital Camera directly from an Power source. This is a preferable means of powering the camera when shooting in a studio environment, when shooting tabletop product photography, or any photo situation where the camera may need to be powered up for long periods of time. Spec. With DC cable: Line Length:90cm; Line diameter:Φ3mm; DC connector size:5.5*2.1mm; Dimension:45.3*33.5*16mm Parameter:9V/2A Compatible models: DC 300 Series,DC301, DC310, DC320, DC330, Digital D400 body, Digital Rebel XT, Digital Rebel Xti, Elura Series, Elura 40MC, Elura 50, Elura 50MC, Elura 60, Elura 65, Elura 70, Elura 80, Elura 85, Elura 90,EOS Series,EOS 350D, EOS 400D, EOS Digital N, EOS Digital Rebel XT, EOS Digital Rebel Xti, EOS Kiss Digital N, EOS Kiss Digital X, FV 500,FVM Series,FVM100(JAN), FVM100KIT, FVM20, FVM200, FVM30, HV Series,HV20 IXY DV Series, IXY DV3, IXY DV5, IXY DVM3, IXY DV5-BL, iVIS DC300, iVIS HG10, iVIS HV20, iVIS HV30, MD Series, MD100, MD110, MD111, MD120, MD130, MD140, MD150, MD160, MD215, MD225, MD245, MD235, MD255, MD265