... billboard 3) Professional technique 4) Durable for using Product Double Sides Scrolling standing light boxMaterialStainless Steel ,Aluminium Alloy ,Steel ... )DC motormicro-control circuitry board,switch,ABS sucking material, roller,lightsCharacteristic Used indoor /outdoor, AC/DC usedCan change 2 ... 1.4m*0.20m2.Aluminum Frame thickness : 200 mm,Double size3.Scorlling System: I-55[Enhanced- built-in ...