... the coolest tail light in the galaxy TOPEAK ALIEN LIGHTGreat visibility by 2 super-bright red ... mode. Can be seatpost mounted or to any Topeak bag with the included fittings.Features:Battery - CR2032 ... )60 hrs / 100 hrsLamp HousingEngineering Grade PlasticMountSeatpost, Topeak BagsSize (L x W x H)4.8 ... 0.73 ozArt.no.TMS032W New arrival !!! Topeak alien led light,led bicycle tail light,bicycle decorative ...