Main Features:Enhance safety of your riding・ especially at nightCool effect with dual red laser rays・ makes you and your bike look attractiveDurable adjustable buckle・ easy to fit the seat post size ( suitable for dia 20 - 36mm seat post )・ not easy to be brokenIPX2 waterproof・ not afraid of moderate rain ( don't put this item into water directly )
Small size・ 73g lightweight・ easy to carry and install on your bicyclePowered by 2 x AAA batteries ( not included )・ working for 9 hours max.