The host comes with charging and discharging curves and peak records to observe the charging and discharging curves and view the maximum valuePowerful computer host software APP Computer online background synchronization setting functionHID online upgrade of host firmware update lifetime free upgrade functionSimple wiring, easy to modify, strong versatility, true 4-wire wiring design, more accurate voltage measurementTest all kinds of battery capacity and various DC power supplies Test all kinds of 0-420V DC power supplies and various batteries, high-definition colorful screen, one screen displays multiple parameters, suitable for all working voltages of 0-420V lithium batteries, lithium iron phosphate, lead acid, nickel metal hydride and other batteries and DC power supplies Model: DT20Measurement voltage range: 0-420V (5V power supply is required for the meter)Measurement current range: 0.3-300AMeasurement capacity range: 0-99999AhCurve function: Dual parameter curve can be paused/runColour:BlackMaterial:ABS Package Contents:1x Battery/Power Tester Only the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.