Manker PL21 Features & Specifications: Emitter: CREE XPG3 / Nichia 219C LEDMaximum 200 lumens outputMaximum beam intensity: 1000cdMaximum beam distance:63metersWorking voltage: 1.8-3.2vPower by 2x AAA batteries (Battery Not Included)Driver: Most efficiency constant current circuitMaterial: Aircraft-grade aluminum bodySurface treatment: Premium Type III hard-anodized anti-abrasive finishAerospace grade aluminium alloy constructionWaterproof: IPX-8 (2 meter under water)Impact resistance: 2metersSize: 133mm length x 14mm head diameterWeight: 29g (without battery)Accessories: O-ring*1 Brightness Levels & Runtime:Low 4lm, 47hrsMid 58lm 4.5hrsHigh 200lm 40min Manker PL21 Operation: ON/OFF: with the light turned off, press the switch until a click is head to enter low output directly, press the switch again to turn the light off.Brightness Adjustment: With the light turned on, turning the PL21 off and on within 0.5 seconds or simply press the switch halfway to down cycle brightness through "low-mid-high" the PL21 will turn on in "Low" by default after it is turned off for 0.5seconds. ***Kindly note: We highly recommend you to choose high quality Eneloop AAA batteries.***
