The Nikon Close-Up Speedlight Kit R1C1 is a lens-mounted strobe system designed for (you'll never believe it) close-up photography. It includes two SB-R200 Speedlight units, an SX-1 Attachment Ring, lens adapter rings for 52mm, 62mm, 67mm, and 72mm lens threads, a couple of Speedlight stands to position the SB-R200 units off camera, a pair of SW-11 Extreme Close-Up Positioning Adapters for the SB-R200 units, an SU-800 Wireless Speedlight Commander to control the lot of it, plus assorted accessories and a carrying case. Ideal for macro use- and that SU-800 can be used to control other strobes, too, if you need additional light. In excellent conditon.