... key, could choose different color changes, 21changes in total;B+: controls the brightness of output signal, each press ... white18White stroboflash8Three-color jumpy changingSpeed and brightness are adjustable19R/B cross fadeSpeed is adjustable,brightness is unadjustable 9Seven-color ... color gradual changingSpeed is adjustable, brightness is unadjustable21G/R cross fade11Seven-color gradual changing