This cable contains a pre-trigger switch. When enabled, the camera behaves as if the camera's shutter release button were held half-pressed continuously. This makes the camera respond more quickly and consistently, but also consumes the camera's batteries much more quickly. When disabled, this cable functions identically to the CM-N3. Using a CM-N3-ACC cable with a PTMM Adapter will provide the same functions as a CM-N3-P cable. This Pre-Trigger (–P) cable works with most PocketWizard radios and has a switch that allows you to toggle half-press on or off at the camera position, but not remotely. A Standard Cable (CM-N3) works with mostPocketWizard radios but has no half-press control, and is for basic remote triggering only. Using a CM-N3-ACC cable with a MSMM Adapter will provide the same function as a CM-N3 cable. A –ACC (CM-N3-ACC) cable allows a compatible PocketWizard radio to independently control both half-press and full-press functions, as well as relay E-TTL signals to compatible flashes whenusing FlexTT5s. Using a CM-N3-ACC cable with a PTMM Adapter will provide the same function as a CM-N3-P cable.Vendor Part # 804-511

Cable length: 3' (91.5 cm) From 1/8" (3.5 mm) Mono Miniphone Via Pre-Trigger Switch To Canon N3 Compatible with cameras using Canon's N3 Remote Terminal including:_Canon_EOS 10D, EOS 1D, EOS 1D Mark II, EOS 1D Mark II N, EOS 1D Mark III, EOS 1Ds, EOS 1Ds Mark II, EOS 1Ds Mark III, EOS 20D, EOS 30D, EOS 40D, EOS 5D, EOS 1V, EOS 1V HS, EOS D2000, EOS D30, EOS D60, EOS-3,_Kodak_DCS 520, DCS 560