Main technical parameters:
1. Lighting
A. The max brightness of the 3 LEDs can reach 32000mcd
B. Squeeze the hand crank at the speed of about 2 times per second for 1 minute can make 3  LEDs lighting 3 minutes (notice: squeeze the hand crank to the end position)
2. Lifespan
A. Switch 10000 times
B. LED 100000 hours
C. Plastic part 5 years
D. Whole unit 5 years

Instruction:
Lighting
1. Release the hand crank by sliding the rear switch to the back position; give a few squeezes for 20 to 30 seconds to generate the power
2. Push the switch forward, 3 LEDs on; push it back, 3 LEDs off
3. Squeeze the hand crank down, slide the rear switch to the front position to lock the hand crank
4.With SOS signal
5.Hand-charnged and no batteries needed