We developed and researched a new model on rolling operator last year. The feature is kind of different than common rolling operators. Our new design has attached the control unit. Users don't need to assemble the receiver near by the rolling operator. If users select this model from us, the rolling shutter will open and close by transmitters freely. It is very convenient. Since this new models promoted in foreign market, we have gotten so much popular response from South-Asia, Middle-East and Europen market. If you are intersted in this product, we can offer you very competitive price shortly.