72-2535 Bench Power Supply, Programmable, 1 Output, 0 V, 30 V, 0 A, 3 A. The Tenma 72-10480 is an affordable single output DC power supply unit offering an adjustable 0-30V voltage output, alongside a 0-3A current output. Easily connect to the unit through the adaptors on the openly spaced user-friendly front panel.