LED gadual change controller Standard(number of seeds): 2-22 seeds,22-36seeds,37-50seeds,50-70seeds Working voltage: AC220V-240V Frenquency: 50-60Hz Feature: the controller adopt Philips integration IC. Having seven colours change. We can customize according to clients requirements. OEM Service.more details are waiting for you.If you have interesting in our products,pls don't hesitate to contract with me.Urgently to your inquiry.