The Glassman ER20P15 is a 300 Watt, 20KVDC, 15mADC power supply. The ER Series models are sophisticated, medium power, high voltage power supplies. The designed in versatility of this standard product line finds itself at home in most applications/environments. With three control panel configurations analog, digital or blank and a full complement of standard remote controls, you might think high price. Not in Glassman's case, just high quality.