Two-wire DC Voltage Meter Head 0.56 Inch LED Digital Voltmeter

Low and high precision
Low starting voltage, red as low as 4.5v, green as low as 4.7v, blue as low as 5.0v.
With reverse connection protection, reverse connection does not burn.
technical parameters:
Measuring range:Red dc4.50-30.0v, green dc4.70-30.0v, blue dc5.00-30.0v
Scope of supply:No additional power supply is required. The voltage under test is used as the power supply. The range is the same as above
Limit input:DC30.0 V. Note: input voltage higher than 30V May be permanently damaged!
Margin of error:Plus or minus 1%; When it is greater than or equal to 10V, the error is 0.3v; When it is less than 10V, the error is 0.10
the input impedance:> 100 k
Working current:Red < 23mA, green < 18mA, blue < 13mA
The refresh rate:About 300 ms
Display mode:Three-digit "0.56 "LED digital tube
According to the color:Red, green and blue are optional
The length of the lead:20 cm
Overall dimensions:48 x 29 x 22 mm, length x width x thickness;
The size of hole:46 x 27 mm
Net weight:18 g
Gross weight:25 g Working temperature:- 20 ℃ ~ 65 ℃