For remotely triggering a camera from Sony cameras with Sony's multi/micro USB port and controlling half-press function using certain PocketWizard radios.The 13377-S is a special remote shutter release cable called a pre-trigger cable. A pre-trigger cable controls both the half-press and full-press function of your remote camera’s shutter release. When a camera is “pre-triggered”, it is like holding your camera’s shutter release button in the half-pressed or metering/focusing position. Compatible with Alpha cameras from Sony that have the multi/micro USB port. This –ACC cable allows a compatible PocketWizard radio to independently control both half-press and full-press functions.NOTE: This cable is compatible with all PocketWizard radios. Will your remote camera be set up for an extended period of time? The 13369-S remote camera cable also has a USB port so you can connect an external power supply to power your camera. How to use:1. Connect the 3.5mm miniphone end of this cable to the receiving Pocketwizard's sync port and connect the multi/micro USB port of the cable to Sony's remote port. 2. Turn on all of your equipment and make sure the Channels match.3. Press the test button on the transmitting PocketWizard radio to trigger the receiving PocketWizard and your remote camera.Specs:Cable length: 3' (91 cm) From: 1/8" (3.5 mm) stereo miniphone To: Multi/micro USB port of Sony's cameras