Compact and aerodynamic design minimizes air resistance in high speed vehiclesTransparent polycarbonate outer and inner lens provides clear signal light transmissionStrong mechanical strength, heat, and UV light resistanceExcellent protection from vibration and impact with use of aluminum boards for both the top and bottom platesInternal heat discharges naturally because each LED module adopts an excellent heat dissipative structureQLV-SET includes amplifier that has a built-in one-touch switch for selection between signal sound and warning lightQLV-SET includes a 100W high volume horn with clear warning sounds1, 250mm, 1, 150mm and 885mm length models are also availableLens color : Blue-Red Red-Red Amber-Amber Green-GreenAvailable in customized color arrangementsMaterialsQLV Light Bar Model : Lens-PC, Cover-Al, Board-Al, Mount bracket-STSQLV-SET : QLV Light Bar Model-PC other SAMP-100-Steel, Al SM-100ND-SteelAmbient operating temperature : -30C to +50CProtection rating : IP56