Precision Variable DC Power Supply: variable voltage output: 0-30 volts, variable current output: 0-5 amp; 4-digit LED Display accuracy: 00.01 V and 0.001A?With USB interface 5V2A ?Display with Output Power Intelligent Temperature Control: It's built-in cooling fan with thermo-sensor will keep the power supply cool, noise reduced and life prolonged. Constant-Current & Constant-Voltage Operation Mode: The two operation modes will switchover automatically as the load changes. There are indicators of the two modes on the Display. Featuring a high accuracy, reliability and perfect limit current protection, thermal protection, voltage overload protection. A grounding port designed onto the device for much more stable and secure protections. Comes with 1pc Output Power Cord, 1pc Input Power Cord.2pc Test probes?Great choice for using in home, labs, and schools,repairing workshops etc.