.so-tab { position: relative; width: 100%; overflow: hidden; margin: 25px 0; } .so-tab label { position: relative; display: block; padding: 0 25px 0 0; margin-bottom: 15px; line-height: normal; cursor: pointer; } .so-tab input { position: absolute; opacity: 0; z-index: -1; } .so-tab-content { max-height: 0; overflow: hidden; transition: max-height .35s; } /* :checked */ .so-tab input:checked ~ .so-tab-content { max-height: none; } /* Icon */ .so-tab label::after { position: absolute; right: 0; top: 0; display: block; -webkit-transition: all .35s; -o-transition: all .35s; transition: all .35s; } .so-tab input[type=checkbox] + label::after { content: "+"; } .so-tab input[type=radio] + label::after { content: "\25BC"; } .so-tab input[type=checkbox]:checked + label::after { transform: rotate(315deg); } .so-tab input[type=radio]:checked + label::after { transform: rotateX(180deg); } Product Description The PRO-Line Auto Top-up system is installed with a simple float mechanism with waterline mark. When the water level in your pond drops below the set level the unit will let mains water through and continue to fill the pond until the water level is back up to the desired set point. The system comes complete and consists of-Water level sensor2 x “Click fit” hose connectorsControl boxLow voltage power supplyWater tight connection for power