Tekpower TP-3003D Digital Variable Linear-type DC Power Supply, 0-30 Volts @ 0-3 Amps With Alligator and Banana Connector Cable Linear Output High precision DC regulated power supply with 0-30 volts and 0-3 amp outputs Two operational modes: constant voltage and constant current Cooling fan automatic activation by built-in thermo-sensor Back-lit LCD Display with a 0.1V and 0.01A resolution Authentic Tekpower brand, sold exclusively by Electronnix through amazon.com with 1-year manufacturer's warranty