With optimised Active Noise Cancelation II technology, the DC iPurifier 2 reduces unnecessary noise. The filter handles 5 V right through to 24 V, and comes with a variety of adapter sizes making it compatible with all power supplies – 5.5 x 2.1mm, 5 x 2.5mm, and 3.5 x 1.35mm. It is effective from 1Hz all the way up to 5GHz. Its strongest performance is in the audible range of 20Hz to 20KHz. Simply place the DC iPurifier2 between the powe supply and the device you want to use.