Single speed crane control, which designed for industrial use.Data is checked via a linking code and the resulting movements are carried out using the high performance CPU.The data checker communicates via a high frequency element. All units for single speed crane control are small & stable with a powerful anti-interference feature, which is possible because they are packed with high-precision SMD. Operating frequency:433.92MHZ band; Power supply is AC/DC 12-24V Or 110V,220V,440V etc. Only has one speed. For more details of the single speed crane control, you can contact us !