This product uses the Faraday Principle of Electromagnetic Energy to make it work. When you shake the flashlight back and forth, a strong magnet passes repeatedly through a wire coil, generating electricity that charges its built-in storage battery then by turning the switch for lighting. This product can also work by using external 3 PCS dry batteries switch 3 LEDs/5 LEDs/7 LEDs for lighting.

Main Technical Parameters:
A. Magnetic power supply. ( 1 Minute shaking, at the speed of 3 times per second )
1. Max brightness: 20,000 MCD
2. Max. luminous flux: 1.7LM

B. Dry battery power supply ( 3 PCS dry batteries )
1. Max. Luminous flux: more than 10lm ( 3 LEDS )13lm ( 5 LEDS )
20lm ( 7 LEDS)

2. Lighting time: more than 100 hours ( 3 LEDS ) more than 80 hours ( 5 LEDS ) more than 60 hours ( 7 LEDS )

C. Life Span:
1. LED: more than 50,000 hours
2. Switch: more than 5000 times
3. Plastic part: more than 5 years.
4. Whole unit: more than 5 years.
Water resistance design.

Size:Ф68*270mm
Weight:390g