Suitable for Nikon camera compliant with CLS; Guide number: 27; Flash coverage: 0.6m to 20m; Exposure control system: i-TTL M (manual); Reflection flash ability: Upward 90 degree tilt, with 0, 60, 75, 90 degree stop bit; Effective flash range: 0.7~19.3m (quick flasking light: 0.7~11.1m); Recycle time: about 4 seconds; Battery lifespan (times of flash): about 100~680 times.