The Cyclops Poseidon Headlamp is a single click headlight that provides up to 2000 lumens of light at a range of 200 meters. The light can run up to 5 consecutive hours and can be removed if you need light at a different angle. FeaturesIPX4Long press to launch 100% which last 40 sec or last until next click on the switchSwitch: single click 40%-15%- 3%- off