... 3pc AG3 batteries, differ color fing ring including differ light. 1. finger ring size in 4cm L * 2cm ... light, such as red finger ring is red light, white finger ring including white light, blue is blue light.4. turn on light ... by button on the top of finger ring, and turn off by hand too.5. total red, ... blue, white & green four color, light is these four color too.6 ...