... ROHS,yboptoe.com,fast delivery Brief Introduction:WY-2CS-13, White Yellow(WY), 2 Color (Dual color) Strobe ... of flashing frequencyDetailed DescriptionWY-2CS-13, White Yellow(WY), 2 Color (Dual color) Strobe LED Bulbs, ... flashing led, Model:YB-3120B4WY-ZM1) 5mm WY flashing led(2 Color(Dual color) Strobe LED ... Model:YB-3120B4WY-ZM,3) With ROHS, Class A , Lifespan: 50 000hours4) Fast flashing/Slow flashing/ ...