FEATURE: CRANKING TO GENERATE POWER ELECTRIC SWITCH FUNCTION:1LED ON -3LED ON-3LED FLASHING -OFF 320 DEGREE TWISTABLE HEAD FOR LIGHTING WATERPROOF UNDER10-METERS DEEP WATER PROTECTION DEGREE OF CASING :IP68 1MINUTE CRANKING CAN PROVIDE MORE THAN 30 MINUTES LIGHTING TIME packing :double blister meas:48pcs/39x24x27.5cm GW/NW:16.5/15kg