The lighting modes change by switching the power button.
Modes: 100%, 50% and flashing.
Power supply 4pcs 18650 battery pack (not included) or 7.2V power supply
This UV flashlight on the head is perfect for looking for amber. It is also great for "loading" oatmeal oats or other phosphorous fluorescent baits in smelt fishing.
An ultraviolet flashlight on the head is a great choice when you need your hands free.