Features ◆ CNC precision cut， lightweight， durable， stylish ◆ STVZO German bicycle lights certification， light stabilizer ◆ Advanced optical technology lens， illumination brightness multiplying ◆ Use American CREE LED chip maker， brightness， saving all upgrade and difficult ◆ Super bright hot light fades white LED， high warning effect， increase traffic safety at night ◆ multifunction switch: a period → times brighter / 30 lumens / 2:00 (h / m) Sec → Brightest / 70 lm / 1:00 (h / m) Three sections → flashing 1/30 lumens / 6:00 (h / m) Sec → Flashes 2/30 lumens / 6:00 (h / m) → Flashes five sections 3/30 lumens / 6:00 (h / m) Sixth → Flashes 4/30 lumens / 4:00 (h / m) ◆ Power detection: Click Detection electricity， can avoid inadvertently switching waste of electricity， long press to turn on the light green → 75 ~ 100% Power Green + red → 25 ~ 75% power red → 0 ~ 25% electricity ◆ 180 degree side visibility， enhance nighttime visibility ◆ strengthen silicone fixed， easy dismantling， sitting on the seat can be easily installed on poles ◆ quick release mounts， without the use of tools to ease installation ◆ USB charging， you can save battery consumption: Charging -> Red is fully charged -> Green ◆ fixed hooks， can be installed on the brim， outdoor hiking， night run are applicable ◆ 1 米 ruggedness test， to prevent accidental loss of function ◆ dropping anti-leaching water resistant design， rainy day also afraid of flooding ◆ LEZYNE manufacturers produced， quality assured