["Description:\r\n-This voltmeter's wiring is simple，it only need to connect two wires，the red wire is to connected to positive pole，the black wire is to connected to negative pole. \r\n-There is for protection when the wires aren'for t correctly connected，the electric circuit won'for t be bumed.\r\n-This voltmeter doesn'for t need external drive working power，it can work with measuring voltage，the working voltage's range is 4.5-30V.\r\n-To reach the best measurement accuracy，this voltmeter will automatically move the decimal point's position according to the different measuring voltage. When it measures the voltage below 10V，it will display two places after decimal point. When it measures the voltage above 10V，it will display one place after decimal point.\r\n-This voltmeter can be used to measure the storage battery's voltage in motorcycles and for cars and also can grasp the storage battery's status. It also can be used to measure other voltage.\r\n\r\nSpecifications:\r\nMeasuring range: 4.5-30V\r\nAllowable error: accurate to 0.01V below 10V, accurate to 0.1V above 10V, allowable error of 1% (+/-1 words)\r\nDisplay mode: 3-digit 0.56′′ LED digital tube\r\nDisplay color: Red/Green/Blue (Optional)\r\nRefresh rate: about 200mS/time\r\nPower supply: No required\r\nCurrent consumption: less than 20mA, generally 5-15mA\r\nWorking temperature: -10C~65C\r\nDimensions:48 x 29 x 16mm / 1.89 x 1.14 x 0.63inch\r\nOpening size: 46x27mm / 1.for 81 x 1.06inch\r\nLead length :20cm / 7.9inch\r\n\r\nPrecautions:\r\n30V is the voltmeter's maximum operating limited voltage，please leave enough margin when working，to avoid voltmeter's permanent damage because of electrical spark ，power supply ripple，or other too high abrupt change of voltage.\r\n\r\nPackage included:\r\n1pcs Digital Voltmeter"]