Features: Mini Digital Voltmeter 3.3-30V Red LED Vehicles Motor Voltage Panel Meter Operating voltage: 3.3-30V Operating Current: !#!lt!*!60mA Display: 0.56"LED red colors Mounting holes: 45.5 x 26.5 mm Measurement rate: 500mS Measurement accuracy: 1% Maximum operating conditions: Minimum operating voltage: +3.3 V Maximum operating voltage: +30 V Operating temperature: -10 to +65 C Operating Humidity: 10 ~ 80% (no condensation) Working pressure: 80 ~ 106kPa Sun exposure: no direct exposure Good stability and high measurement accuracy Appearance in a standard size easy to install Power supply polarity protection circuit Specifications: Original box: No Color: Black Item size: 48 x 29 x 21 mm Net weight: 17g Packing content: 1 x Digital Voltmeter