The VT4-DWS11 takes the VT4 system to the next level with two added housings for sediment and carbon filtration. The VT4-DWS11 includes 2 10" filter housings with two filters included; The AWP117, a 5 micron carbon filter with pre and post sediment filtration to reduce taste and odor, and the AWP110, a 5 micron polypropylene sediment filter. This extra layer of filtration signifcantly reduces small particles and bad tastes/odors in your water. The VT4-DWS11 is for point-of-use applications such as single faucets and water fountains. Other features include a stainless steel UV chamber, capable of 100-240V, 50-60Hz and easy installation. Though the VIQUA VT4-DWS11 comes in various voltages, be aware of which versions meet your requirements since the electrical connections are integrated into the controller making specific models suitable for specific voltages.