Features:  Constant current electronic load tester, with maximum 100V load voltage/ 20A discharge current/ 250W discharge power. It's multifunction and can accomplish discharging and aging, and test the capacity of the battery.  It uses IR power tube and double high-ball bearing cooling fan, with fin heat sink, which is not afraid of dust and can provide rapid heat dissipation for long-term use; power redundancy is no less than 50% (25℃).  Digital screen provides clear visual display, easy to read; compared to LCD, it is more resistant to high temperature.  Voltage and current wiring connectors are separated, with appropriate connection, it can eliminate the influence of wire resistance to voltage.  100% power burn-in in factory, suitable for assembly of power adapter -automatic burn-in cabinet.    Instruction:  1. Connect to 12V power supply then power on to electronic load mode. Make sure it is at stop condition (knob clockwise is minimum) then connect the tested power supply to the input power port, pay attention to the polarity.  2. Rotate knob to set the constant current.    Note: Since it works openly, there is no voltage and power limitation, but normal work should be below 100V, 250W.    Specifications:  Material: PCB + Aluminum Alloy  Power Supply Voltage: DC 12V (±5%) (Equipment supply voltage)  Maximum Load Voltage: 100V  Constant Current Discharge Adjusting Range: 0-20A  Work Mode: Constant Current Mode  Maximum Discharge Current Error: 0.7%-0.01A  Maximum Discharge Power: 250W  Item Size: 12.8 * 11.5 * 8.8cm / 5.04 * 4.53 * 3.46in  Item Weight: 805g / 1.78lbs  Package Size: 14 * 13 * 11.8cm / 5.51 * 5.12 * 4.65in  Package Weight: 910g / 2.01lbs    Package List:  1 * Constant Current Electronic Load Tester  1 * Cable  2 * Washer