Focus Adjustable Ultraviolet Flash Light & Multi-mode Switching：Focus adjustable LED ultraviolet flashlight， head up to 1250 square feet floodlight and 328ft distance narrow beam. 4 modes ，Short press the switch to switch three purple light modes in sequence (395nm purple light → 365nm purple light → 395+365nm dual purple light on); Long press the switch in any mode to enter 365nm purple light mode; COB white light is in hidden mode, long press the switch to start.