Technical parameters:   1, Shell: T6061 aluminum alloy ；  2, LED: CREE 7090 XR-E P4;   3, Switches: plastic switch, the light flexible, durable, repeatedly, repeat times is over 100,000 ;   4, reflective Cup: aluminum reflective of the assumed Cup orange peel;   5, lenses: steel and chemical lenses, Transmission rate of 98%;   6, surface address: hard oxidation process  7,The maximum brightness: 160 lumens;  8,Driver :0.9-4 .2 V-dimming circuit, MCU control;  Circuit features:   There are two operating modes:  A: Low-light--- high-light direct switching; B: Low-light--- mid-light---high-light direct switching; C: low---mid--- high-light --- flash (10 HZ) --- slow flash (1 HZ) SOS   Both models can easily switch between the options:  Low-light: About 20 lumens, a battery can be used for 45 hours;   Mid-lght: About 60 lumens, a battery can be used for four and a half hours;   High-light: About 160 lumens, a battery can be used for 40 minutes;   (The above or by ordinary AA batteries, lithium batteries can use for a longer time)  2, the products are small, with light;  3, a waterproof design, body with anti-skid design, in the rain let you use more convenient;  4, waterproof capacity: 10-meter diving;  5, Reverse-battery protection: Loaded with electronic counter-battery protection, no loss, do not damage the battery Battery Type: AA batteries drive or AA batteries with the same shape with the 0.9 --- 4.2 V battery can be use(including lithium); Size: D20.5 mm *D20 mm*L 91.2 mm  Weight: 43g (without battery)