Features:  [DC Programmable Electronic Load Tester] -- With 150V wide voltage, 40A large current, 400W large power, it provides CC, , CR, CP and CC+, CR+several basic measurement modes, professional battery test and LED test.  [High Performance Load] -- The Tran test mode can test the dynamic output performance of the power supply; the scan test mode can test the continuity of power output within a certain range; the list test mode can simulate a variety of loading status changes; the shot circuit test can be used to simulate load short circuit.  [User-friendly Design] -- 2.8-inch TFT LCD screen provides clear digital display, which greatly enhances the reading and using experience. The operation process is simple and convenient, and with key lock function to prevent misoperation.  [Other Functions] -- Remote operation via USB interfaces. Built-in buzzer alarm. Maintain data storage in case of power failure.  [Multiple Safety Protection] -- It provides overcurrent, overvoltage, overpower and over temperature protection. The over current and overvoltage parameters can be set flexibly, so as to effectively protect the load. With input polarity reverse prompt.  [Intelligent Fan Speed Control] -- It has intelligent fan speed control function, which can effectively reduce the fan noise when it's working. With multiple cooling holes for porous heat dissipation, prolongs service life.    Specifications:  Plug: EU/ US (Optional)  Display: 2.8" TFT LCD Screen, 400*240 Resolution  Rated Power: 400W  Rated Input Voltage: 0-150V  Rated Input Current: 0-40A  Mode:  0.1-19.999V, 0.1-150.00V Range  1mV, 10mV Resolution  ±(0.05%+0.02%FS) Accuracy  CC Mode:  0-3.000, 0-40.00A Range  1mA, 10mA Resolution  ±(0.05%+0.05%FS) (0-30A), ±(0.08%+0.1%FS) (30-40A) Accuracy  CR Mode:  0.05Ω-1KΩ, 1KΩ-4.5KΩ Range  10mΩ, 100mΩ Resolution  ±(0.1%+0.5%FS) Accuracy  CP Mode:  0-400W Range  10mW Resolution  ±(0.1%+0.5%FS) Accuracy  Tran Test Mode: CC,  T 1&T2:  1ms-60s; 0.1%+1ms Accuracy  Battery Test (Discharge Mode): CC, CR  Max. Discharge Capacity: 9999Ah  Resolution: 1mA, 10mA, 10mΩ, 100mΩ  Interface: USB  Operating Temp.: 0~40& 8451;  Storage Temp.: -10~70& 8451;  Relative Humidity: <80%  Item Size: Approx. 90 * 190 * 310mm / 3.54 * 7.48 * 12.20in  Item Weight: Approx. 3600g / 7.94lbs  Package Size: Approx. 39 * 29 * 19.5cm / 15.35 * 11.42 * 7.68in  Package Weight: Approx. 4300g / 9.48bs    Package List:  1 * DC Programmable Electronic Load Tester  1 * Power Cord  2 * Fuse  1 * User Manual (English)