The BK Precision 1550 Switching DC Power Supply is a compact 108 watt power supply delivering 1-36V and 0-3A from its main isolated output. A unique feature of the 1550 supply is the USB 1.1 charging port located on the front panel allowing the user to charge a cell phone or MP3 player. Clean power and quiet operation make this power supply ideal for laboratories work shops and schools where bench space is limited.