It can easily calculate the voltage, current, power, discharge amount, and discharge time of the aircraft, and it is convenient to calculate the force effect of the multi-rotor aircraft. Operates From:4.8-60V(When the voltage is lower than 4.8V, an external 12v1A power supply is required) This meter provides Realtime readings of Voltage 0-60V, Current 0-100A, Power 0-6554W. This device accumulates Charge [Ah] Amphour and Energy [Wh] readings till it resets or shut off. This meter also captures and stores Amps Ap, Power , Minimum Voltage Vm during the operation. Professional battery tester,Great Performance and Precision. Precision error: 0-100A, resolution 0.01A; 0-60V, resolution 0.01V; 0-6554W, resolution 0.1W; Specification: Brand new Product Name:Power Analyzer Material: plastic + electronic accessories Colour: Black Backlight Color:Blue Dimension:. 85 x 45 x 25mm Current: 0-100A, resolution 0.01A, continuous current 50A Voltage: 0-60V resolution 0.01V Capacity accumulation function: 0-65AH Power accumulation function: 0-6554WH Package Contents: 1 x WATT Meter 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.