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