Nikon R1 Wireless Close-Up Speedlight System Includes - 2x SB-R200 Wireless Remote Speedlights, SX-1 Attachment Ring, SS-MS1 Close-Up Speedlight Kit Case, 2x SS-R200 Soft Case, SS-SX1 Soft Case, SG-31R IR Panel for Built-In Flash, SW-C1 Flexible Arm Clip, 2x SW-11 Extreme Close-Up Positioning Adapter, SW-12 Diffuser, SY-1-52 52mm Adapter Ring, SY-1-62 62mm Adapter Ring, SY-1-67 67mm Adapter Ring, SY-1-72 72mm Adapter Ring, SY-1-77 77mm Adapter Ring For use with use with Nikon i-TTL SLRs without built-in Speedlights including D2X, D2HS, D2H and F6 Recycling time - 6 seconds or less / Number of flashes - Approximately 290 SB-R200 Wireless Remote Speedlights - Guide number - 10/33 (ISO 100, m/ft.), 14/46 (ISO 200, m/ft.)