It features 5 modes:High -medium -low -flash-SOS, Long press stepless dimming. After opening for 10 seconds, it can be directly closed without passing through any gear position Specifications: Voltage: 2.8-6.6 volts Battery Supported: single 18650 or 21700(Battery not included) Dimension: 165mm(length)* 35mm(head)* 30mm(head) Net Weight: 130 gram (no batteries included) Made by Aircraft 6061 grade-aluminum alloy, Premium type Ⅲ hard-anodized anti-abrasive finish to get solid built body, anti-crash. Toughened glass lens with purple AR coating; Smooth Reflector Reverse polarity protection: to protect from improper battery installation Constant current output is adopted Advanced temperature regulation (ATR) technology: It adjusts the brightness level automatically when the driver temperature reaches 60℃ to keep the light from overheat. Automatic Stepdown: Turbo steps down to High after work...