Red full screen, full screen yellow and green color signals screenful three single-screen display. Beautiful appearance, high brightness, long life, the indicators meet the GB14887-2003 standard. High brightness LED light source, low calorie, environmentally friendly energy. Each LED lamp with protection circuit, a single light-emitting tube damage does not affect the electrical properties of the whole lamp. Specifications: ￠ 300; ￠ 400; ￠ 500; lamp shell material: Aluminum, PC, die-cast aluminum Installation: horizontal installation, vertical loading