The PocketWizard CM E3-ACC-1 Pre-Trigger Remote cable allows you to connect a PlusX, Plus III, FlexTT5, or MultiMAX with ACC port wireless transceivers with the canon E3 remote terminal or a sub microphone of 3/32 inch (2.5 mm). This specially designed cable helps you remotely use the half trigger function of the camera. This function allows you to rectify the metering and focusing position before clicking the picture. The cable also allows compatible PocketWizard radios to control both half press and full press functions independently. The cable has a length of 3 feet (91.5 cm) or 1 foot (30 cm).