... the instrument.PRODUCT FEATURES·3 channels regulable output, 1working independently, in series or in parallel.·The 192×64 LCD Display can ... over temperature protection.·Intelligent control fan (Vary with different output power.).·Built-in buzzer as a warning prompt.·Accurate calibration software.·The ... 220V±10%,50Hz or AC 110V±10%,60Hz (optional)Output Voltage RangeCH1:0~32V, CH2:0~32V, CH3:0 ...