Features: High accuracy dual-display with bright and clear readings. Voltage and current power measuring instrument that measures and displays voltage, current, and power of the circuit under test. Adjustable resistance allows fine-tuning of the display value. Does not provide voltage boosting or current limiting regulation, so it does not affect the actual voltage and current of the circuit under test. Wiring: red cable for positive, black cable for negative; no connection required when testing loop current. Fine-tuning available for voltage and current display; no-load current may not return to zero. Specifications: Material: ABS Operating voltage: 6-120V DC Voltage measurement range: 6-120V; below 10V displays as 0.0V; voltage starts at 6.00V with a 1V error range Current measurement range: 0-10A; current starts at 0.03A with a 3% error Note: Please allow 1-3cm error due to manual measurement. Ensure you are comfortable with this before purchasing. Due to differences between monitor displays, the image may not reflect the actual color of the item. Package includes: 1 x Digital Ammeter Voltmeter