Features: Mini Digital Voltmeter 0-100V Red LED Vehicles Motor Voltage Panel Meter Operating voltage: 4.5 ~ 30V (with reverse polarity protection function) Test voltage: 0 ~ 99.9V Operating Current: !#!lt!*!60mA Display: 0.56 \""LED red Mounting holes: 45.5 26.5 mm Measurement rate: 500mS Measurement accuracy: 1% Maximum operating conditions: Minimum operating voltage: +4.5 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 A good stability high measurement accuracy Overall in a standard size easy installation Power supply polarity protection circuit Specifications: Original box: No Color: Black Item size: 48 * 29 * 21 mm Net weight: 18g Package weight: 27g Packing content: 1 x Digital VoltmeteraeProduct.getSubject()