This Replacement Foot/Slave from Wein provides users the the ability to repair or replace a broken foot on a Vivitar 283 or 285 flash unit and add functionality with the addition of household-style and PC sync terminals, as well as a 1/4"-20 female thread on the base. This foot accepts the included H-prong optical slave and enables battery-free wireless triggering from up to 150' away with Surround Sync for omnidirectional usage. Also, the PC terminal enables simple wired setups. The base will easily mount to a tripod or light stand with the female thread and it includes all hardware necessary for attaching to the Vivitar flash. It does require a #0 screwdriver for complete installation.