Tekpower TP3003D-3 Digital Variable Triple Outputs Linear-type DC Power Supply, 0-30 Volts @ 0-3 Amps High precision DC regulated power supply with triple outputs, 0- 30 volts and 0-3 amps 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