Bright led illumination: Super bright LED flashlight the maximum output brightness is up to 18000 lumens, adopts LED to emit even, super bright spotlight. Diving Light can be used in maximum 80meters underwater. Ideal outdoor flashlight for fishing, diving, swimming, hiking, sailing, caving. Solid Durability: Under water diving lights made of Compact aluminum alloy case, toughened glass lens, and shock-resistant and crash-proof, make sure dive lights works well in the water and out. Switch 5 Modes: Left switch for the white light(Strong / Medium/ Weak / Long press for 2 secs to turn off) and the other one for the red & blue light(Red / Red strobe / Blue / Double click for strobe / Long press for 2 secs to turn off). It allows you to adjust the brightness according to the underwater environment, Suitable for different situations. Scuba dive lights lifetime >50,000 hours. Powered by 4 rechargeable 18650 Li-ion battery (not included in package). Troubleshooting. If the diving flashlight cannot work normally, it is recommended that check whether the battery is of a suitable model and whether it has enough power. And our service team will also respond within 24 hours.