Features: Multifunctional measuring instrument for high operation 1.14-inch high-definition IPS LCD color screen, 135*240 resolution Maximum current measurement 20A Support data clearing, no-load , fine-tuning, current fine-tuning Measurement and display of real-time , current, power, -percentage of electricity and internal resistance and instrument temperature, cumulative capacity, energy,peration. Parameter: Input/output interface: 20A high current 2P terminal Instrument working : XH-2.54-2P red and black wires, power supply DC6~30V Common power supply DC6~120V measurement range: DC0~120V Current measurement range: 0.00A~20.00A Capacity measurement range: 0~9999.99Ah Electricity metering range: 0~9999.99Wh Impedance measurement range: 0~9999.99 Temperature measurement range: 0~99 Time measurement range: 0~999:59:59 (hour::second) Data reset: support No-load return to zero: support fine-tuning: support Current trimming: support Percentage power display: Supports percentage power based on reference (full power and no power need to be manually set) Product size: 47.59 x 28.67 x 25.33mm Installation hole: 45 x 26mm XH-2.54-2P red and black wires Parameter: Thin red wire: positive power supply Thin black wire: Negative, and thick black wire construction site, do not need to connect when measuring loop current This wire is only used as an power supply when measuring voltages 6V, and it is not necessary to connect this wire when measuring voltages above 6V. Material: Plastic colour: black Package Contents: 1 x Multifunction Tester 1 x wireway 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.