1.super bright bike light 2.use 3*cree xml-t6 ... :8.4V,four-mode memory dimming circuit,point-touch switch with cable. (1)Low: brightness 380LM (2)Mid: brightness 750LM (3)Hig ... ,voltage: 8.4V,providing one rubber ring for the wired switch and the professional fixed frame,special design for bicycle fan ...