LED Screen Voltage Tester Mini Water-proof Voltmeter Ammeter High-accuracy 3-wire 4-digit 0-33.00V Voltage Meter Diagnostic-tool

This is a very practical mini voltmeter, portable, water-proof,dust-resistant and shock-proof. It has 3 wires to connect and has reverse polarity protection. Clearly display the testing results in the LED screen and can be widely used in automobile, motorcycle and other rugged environment. You should own it to make your work easier.
Features:
Adopts fully-closed shell and encapsulated design, water-proof, dust-resistant and shock-proof.
0.31" LED digital tube and 4 digits for display, 0-33.00V measuring range.
3 wires for easy connection, with reverse polarity protection.
Widely used in battery voltage detection of automobile, motorcycle, electrombile and other applications.
Specifications:
Display Color: Red LED
Digital Tube: 0.31" 4-digit
Supply Voltage: 3.5-24V
Measuring Range: 0.00-33.00V
Accuracy: 0.3%(+/-)2dgt
Wiring Length: 11cm / 4.33in
Working Temperature: -10°C-65°C
Working Humidity: 10-80% (NO Condensation)
Working Air Pressure: 80-106kPa
Item Size: 47 * 20 * 1.5mm / 1.85 * 0.8 * 0.6in (L * W * H)
Item Weight: 14g / 0.52oz
Note:
Red Wire: positive pole of power supply, connect the positive pole in the range of DC 3.5-24V.
Black Wire: public negative pole, it's positive pole of power supply and also referent negative pole of measurement.
Yellow Wire: measuring signal input positive pole, 0.00-33.00V.
Package List:
1 * Water-proof Voltmeter