New Lock mode: Based on most customers' experience with RovyVon Aurora series, we added Lock mode on the A8, no more worrying about accidentally turning on the flashlight in your pocket or elsewhere (Note: please unlock this model by charging or 5 clicks) Momentary On Mode: long press and hold the button, the A8 will enter high mode, max output 650 lumen, release the button to turn off, illuminate your surroundings at all times