Display size: 0.28"

Measurement range: 2.5-30V

2 wire connection: Red to the Positive and Black one is Negative;

Measurement accuracy: 1% or 0.01V (Factory adjusted accuracy, but use the micro-trimmer to adjust if needed )

Accuracy adjustment: Yes, with micro trimer (Picture 5)

Working temperature: -10 °C to 65 °C

Operating current:＜20mA; depend from the color, but ~8ma, measured by me

Operating Humidity: 10 ~ 80% (no  condensation), but not waterproof

Display Size: 22.5 x 10mm

Dimensions: 30.5 x 11 x 9.5mm