T-king(TM) KL283 2CH Dual Channel Adjustable LCD DC Electronic Load 110V 300W 80V 30A Operating modes are given voltage and constant current, especially for LED power supply and battery testing and aging Voltage and current are four high-precision digital LED display Over-voltage, over-current, over power, overheating, reverse polarity protection Voltage, current, high-resolution Small size, high power, simple operation