Ruideng 0-33v 0-3a Four Bit Voltage Current Meter Dc Double Digital Led Display Voltmeter Ammeter

This is the cheap version, the current range is unchangeable. If you want higher version, please click this one: 1059961 Feature: Weight: 21g Display color: A: Red+Red B: Red+Blue C: Red + Green Display mode: Dual 0.28 LED digital 4 bit tube update rate: About 200 ms/time Physical size: 48 x 29 x 26 mm (L*W* H) Opening size: 45 x 26 mm (L*W) Supply voltage: 3.5-28V Lead wire length: 14 cm(Five wires) Measurement range: DC0.00-33.00V(voltage, Resolution 0.01v ) 0.000-3.000A(current, Resolution 0.001A) Operation temperature: -10 degrees~65 degrees Current measurement accuracy: (0.3% + 2words) Instruction of wiring: Red thin wire (VCC): Power input + 3.5-28V (NOTE: If the measuring signal is lower than 28V and have abundant power supply, it can be used as power supply for the module [black wire and yellow wire are contacted together to use]) Black thin wire(GND): Power input- Measurement signal - 3.5-28V Yellow thin wire (VIN): Measurement signal + (0-99.9V) Red thick wire (I+): Current input + (connect with load negative) Black thin wire(I-): Current input - (in series in power supply negative) Circuit Diagram: Voltage current meterin the measurement system for power supply System supply power-1 System supply power-2 Package included: 1 x 0-33V 0-3A Four Bit Voltage Current Meter