LED cap light 90 degree flexible rotation clamp 9pcs LEDs as lighting source Working with 2pcs CR2032 button cells LED cap light90 degree flexible rotation clampThis LED camp light can be widely using like: night ride,night walking, fishing,repairing,construction...7pcs LEDs, 9pcs LEDs, or 11pcs LEDs possible. Rotational LED cap light with 11pcs LEDs