... booxlight source:5*LEDpower source:3*AAA(headlight)2*AAA(taillight)type:key switchheadlight feature:1-steady,2-flashingtaillight feature:1 ... -steady,2-flashing,3-slow flashing,4-fast flashing.taillight size:3-3.5cmPackaging DetailsUnit Type:lot (20 pieces/lot ... .87in x 11.81in) 5 LED in inside,withe the taillight