Actume 2pcs 028 LED Voltmeter Ammeter Red and Blue Digital Multimeter Display Voltage Current Tester DC 0100V 50A Dual Display Detector Voltage Current Meter Panel Amp Volt Gauge

Features:   1. Using original imported chips, adjustable voltage resistance.   2. The dual-color dual-meter is small in size and can simultaneously display voltage and current on the same screen   3. High precision, high reliability, suitable for high-end applications.   4. With reverse connection protection, the circuit will not be burnt if connected reversely.   5. Adopt a common ground design.   6. With shell anti-collision design, high durability.     Package Included:   Wiring:   Black line (thin): vacant or buck circuit (module) negative   Red line (thin): power supply+   Black line (thick): COM, common measuring   Red line (thick): PW+, measuring terminal voltage input positive   Yellow line (thick): IN+, current input+   (Please refer to the wiring diagrams for more details)   Notice:   The voltage between the thin red and thin black lines must be within DC 4.5-30V   The ammeter can only be connected to the negative of the device under test   50A below ammeter (include 50A), built-in shunt, does not require external shunt   When the black thin line vacant, it is better to use insulating tape around the exposed part of the wire, to prevent short circuits   If just be used as a voltmeter, it is recommended that the yellow line and the black line were connected together, to prevent the ammeter digital flashing   2* DC 100V 50A Voltmeter Ammeter Blue + Red LED Dual Digital Volt Amp Meter Gauge