Specifications:Brand new and high quality. Measuring range: DC 0V--30V. Input range: DC 5V-30V(Max Input: DC 30V. The device can be damaged if input is over 30V). Working Current:< 13mA. Display Color: Blue. Display Mode: Three 0.36 "digital tube. Measurement accuracy: Â±1%. Refresh rate: about 300mS / times. Input impedance: > 100K. Operation Temp: -10â„-+65â„. Size:2.8cm x 4.7cm x 2.1cm.