Made of durable two-layers of hard-anodized aluminum body, hardly getting scratches in which perfect for work and leisure scenes. The NEXERA series is selectable 5 dry battery models and 5 USB rechargeable models. By pressing the side switch, the output pattern will be switched to the different operation mode, but "Instant-Off Switch" can control to stay at any output mode even after switches off. "Focus Control" models can adjust wide to spot beam distribution and "Reflector" types deliver smooth and wide beam. Unique features-"Slow Lighting Off" switch which turns off the light slowly. All items have IPX4.