This multi-mode great range remote control kit—S4U-AC220-ANT2+ CB-4. It has four working modes. They are toggle mode, momentary mode, latched mode as well as toggle& momentary mode. You can choose any of them according to your own requirement. The working distance is up to 2000m (6000FT) in open air with external mount antenna. It is very appropriate for outside pond fountain. There are totally four channels. It is 10amp current for each channel. The working voltage range of relay is AC 110—240V or DC0~28V. The highlight of this product is that it can activate different electrical devices with different working voltage simultaneously.