... 1080)Audio InputRCA ×2Audio Output2.5W Speaker×2(bus)Intelligent LED backlightAdopt international popular LED backlight, ... other toxic substances, more energy saving and environmental protection.System Control ModeContrast, brightness , sharpness , color saturation , hue ... the international RHOS environmental standard. 15 Inch bus station LED CCTV Monitor,led backlight system,waterproof shell case