1、Three interfaces can be switched. 2、This product will automatically record the output electric quanlity, electrical energy, output load time, all these are automatic, and it can show the load record an accumulation respectively. 3、This instrument is a unidirectional measurement with high accuracy. Through accurate software algorithms, it can achieves high-accurate display of battery capacity. 4、16 functions in one: voltage measurement, electricity measurement, clear screen, upper and lower limit, temp measurement, backlight settings, auto-off when fullycharged, power measurement, intelligent menu, timing function, alarm prompt, capacity measurement, power-off memory, ultrawide voltage, built-in 20a shunt. 5、Compact size and convenient to operate. 6、Comes with a foldable stand for easy placement on the desktop. Voltage: AC85-265V-50/60hZ, DC0-200Volt Current: max. 20A Power: 0-4000W Test capacitance: 0-999.99AH Temp display: -10 to 120℃ Time record: max. 999days 99h 59min Working current: with backlight 7mA. without backlight 5mA Item size: 145 * 85 * 35mm / 5.7 * 3.3 * 1.4in Item weight: 218g / 7.7ounce Package size: 180 * 120 * 60mm / 7.1 * 4.7 * 2.4in Package weight: 327g / 11.5ounce 1 * Direct-Current Parameter Testing Recorder 4 * Test Cable