.LED light: 0.5W, 5500K±200, Ra 90

.Group and Channel: Group A/B/C and channels 1/2/3/4

.S1/S2 transmission: indoor＞20m outdoor＞10m

.2.4G wireless distance: Remain stable within 15m in any angle, distance of alignment and actual measurement is＞100m in an open environment

. Cover angle: cover light of 24mm lens Recycle time: 4s 1/1 output (2.4-2.8V)

.Battery: 2xAAANI-MH(for R200): 2xAANI-MH(for GT620) battery(Not included in the package）

.Operating temperature:-10~50 ℃ Storage temperature: -20~70 ℃

FLASH CHANNELS AND GROUPS

Both flash systems allow configurations for 4 channels and 3 groups. Both the commander and flashes must be set on the same channel, and different flash powers can be set for up to 3 different groups of flashes. This is completely identical to Nikon's Creative Lighting System (CLS).