Fangrui Product Details 1. Triopo Tr-15ex Macro Ring Ttl Flash Light With 6 Different Size Adapter Rings For Nikon I-ttl (black) 2. Features 3. 2.9 Seconds High Speed Recycle Time And Support Led Assist Lamp, Not Let You Miss Very Weonderful Moment 4. Multiple Flash Mode: Ttl Auto Flash For Convenient Operation As Normal Auta Exposure, Multi Flash Mode And Rear Curtain Sync For Shooting A Moving Object 5. Flash With Adjustable 8 Grades Flash Brightness, Design For A Complete Picture With Paticular Subject And Accurate Exposure 6. Dot-matrix Lcd Display With Backlight Mode, Can Achieve Easy Adjustment For Clear Night Photography 7. Compatible With Nikon I-ttl Series. 8. Specifications 9. Model: Tr-15ex 10. Camera Type: For Nikon Camera: I-ttl 11. Power Supply: 4 X Aa Size Batteris(alkaline Or Ni-mh Batteries, Not Included) 12. Guide No. ((iso 100): Gn14 13. Number Of Flash (full Power: 11): Approx 450 Times 14. Ms1s2 Mode Control Flash: 1128~11 15. Rpt Mode Control Flash: 1128~14 16. High Speed Sync Mode: 132~11 17. Recycle Time: 0.05~2.8s 18. Color Temperature: 5600k+-200k 19. Flash Duration: 1300s - 110000s 20. Flash Trigger: 3.5mm Pc Sync Hole, Optical Control, Test Key, Wireless Control Plug 21. Illuminance Full Lux: 440lux (0.5m)