Wurkkos WK20S 4modes powerful 2000LM SST40 LED 18650 300M diving flashligh

Description☀LED bulb: Cree XHP35 HD LED, with lifespan of 100,000 hours☀CCT Range: 5000-5500K☀Voltage: 2.8-6 Volts☀Battery used: 1* 18650 3.7 Volts Li-ion lithium battery (not included in package)☀Size: 40mm(head) *25mm(body diameter)*144mm(length)1.58 in(head) *0.98in(body diameter)*5.67in(length)☀Weight: 0.39lb, excluding battery /178.5gram, excluding battery☀Material: 6061 aircraft-grade aluminum alloy☀Light Cup: orange peel reflector☀Toughened glass lens with AR coating☀Premium type Ⅲ hard-anodized anti-abrasive finish and better heat exchange☀Side switch to turn on or adjust light modes from low to high☀Reverse polarity protection, to protect from improper battery installation☀The waterproof level is IPX-8, it can be used in underwater 150 meters. And it is suitable in diving, searching and other usage.☀Mode Memory: Yes.☀Low Voltage Protection: The light steps down to lower modes automatically when the voltage is lower,it turns off automatically when the voltage was lower than around 2.8 Volts,and please change another full battery or charge the battery.☀Advanced Temperature Regulation (ATR) technology: ATR will adjust the brightness automatically when the temperature reaches 50℃ (122 °F) to prevent overheating.ANSI/NEMA FL1 Chart