The Wein PN Peanut Slave is the most basic in the line of optical slaves. It connects to any standard PC sync socket, directly or with use of a PC cord. It provides coverage with a range of up to 100'.
Note:
Not compatible with the Canon 580EX II flash
Tiny size, weighs less than 1/2 ounce
Up to 100' range (indoors)
Solid cast epoxy won't crack, protects micro-circuitry inside