... luminance *High quality speaker *Hand power generation flashlight *FM radio flashlight, outdoor, camping lamps and lanterns, camping lamps, hand ... hand operated emergency charger* flashlight three LED lamp * FM radio * DC interface, 3 V voltage Working principle:Hand generators, ... rectifier, voltage stabilizing, lithium batteries for built-in, make the radio work, LED shine. · product size (cm) : 17.7 ...