5 modes to choose from depending on your activity! Green Beam, Blue Beam, Red Beam, Slow Speed Rotation Color Change, High Speed Rotation Color Change, Water Pressure Resistance: 328.6 ft (1,200 m), Switch between flashing patterns, Green LED lights up when you tighten the battery case. Once loosened and turned off, quickly tighten for 2 seconds to switch to blue. Repeat the same action to turn red. Repeat again to change color slowly. If you repeat it, you will get the most fast rotating color change. - Continuous illumination time: Green beam: Approx. 22 hours, Blue beam: Approx. 24 hours, Red beam: Approx. 18 hours, Low speed rotation color change: Approx. 36 hours, High speed rotation color change: Approx. 30 hours *Continuous lighting time is an estimate when using 1900 mAh AA batteries.