Quality/Safety Certification:ISO9001,CE,ROHS a) Environment protection, never needs batteries, 1 LED / 3 LEDs, patented product, double copper coil wires d) 1 minutes cranking gives you up to 30 minutes of 1 LED lighting e) 1 minutes cranking gives you up to 15 minutes of 3 LED lighting p) Luminosity: 20,000mcd (1 LED) / 40,000mcd (3 LEDs) q) Body construction: ABS r) Product dimensions: 48cm x 22cm s) Net weight: 330g