CameraPlus CPN580TTL Master Speedlite i-TTL Flash (TTL Speedlite) Free Diffuser for Nikon cameras D800 D800E D600 D7100 D7000 D5300 D5200 D5100 D5000 D3300 D3200 D3000 D300 D200 D90 High-performance TTL electronic flash unit, perfectly compatible with Nikon i-TTL. Sharp and clear LCD backlit screen, Quick Recharge Time: 3 sec.Guide Number: GN 50 ISO 100,105MM focus distance)-tested good figure. Support Nikon wireless flash system (master/slave), Support wireless output setting for different groups in M mode., Support On-Camera / wireless TTL Exposure L ock Front/ Rear curtain sync, TTL Auto exposure with Exposure Compensation :-3.0EV to +3.0EV Temperature test (high-temperature alarm )