Ammeter (0-100A) the ammeter head, powered 4-30V with shunt

The ammeter Basic performance parameters are as follows:

Opening size: 45.5mm * 26.5mm
Dimensions: 48mm * 29mm * 21mm
The ammeter measuring range: DC0-99.9A
Supply voltage: DC4-30V 2 line access
Weight: 23 grams / only (Table head weight)
Display: 3 0.56 LED digital tube
Display color: red
Refresh rate: about 500ms /
Measurement Accuracy: ± (1% +2 words)