Specification Brand : Wondiwe BulletPoint : BulletPoint1 : This is a DIY kits,need buyer to assemble it. BulletPoint2 : Power display is to take some voltage, perform simulations show the percentage of segments, such as 3.7V lithium battery, take the lower voltage 3V, the upper limit of 4.2V, 4.2-3 = 1.2V, the voltage difference between the lower limit of 1.2V, is the battery Analog power up BulletPoint3 : LM3914 can accurately detect an analog voltage, and 10 LED display, display dot mode LED is lit 10 one, or in a stripe pattern individually lit LED BulletPoint4 : Display Displays the battery voltage between the lower limit of 10 files showed that representatives of each of the lights 10% charge displays, on behalf of 10 lights display charge 0% -100% range; you can also change the single light display, is displayed only a light, more power, single-light power 4mA, all bright 42mA BulletPoint5 : Equipment needed: an adjustable power supply, precision accuracy of the decisions of the panel display. Watches word screwdriver. Color : Green,Red ExternallyAssignedProductIdentifier : 7401520005088 ExternallyAssignedProductIdentifier1 : 0761882523017 ExternallyAssignedProductIdentifier2 : 761882523017 ItemName : Wondiwe DIY Kits LM3914 3.7V Lithium Battery Capacity Indicator Module Tester LED Display Board ItemPackageDimensions_Height : 19.3 centimeters ItemPackageDimensions_Length : 5.4 centimeters ItemPackageDimensions_Width : 15.6 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : auto-battery-testers Manufacturer : Wondiwe MeasurementType : Voltmeter, Ohmmeter, Multimeter MinimumOperatingVoltage : 12 volts_of_direct_current ModelNumber : PCE-CBA 10 PackageLevel : unit PartNumber : HGHS20110400508 PowerSourceType : Battery Powered ProductDescription : Features: This is a DIY kits,need buyer to assemble it. Power display is to take some voltage, perform simulations show the percentage of segments, such as 3.7V lithium battery, take the lower voltage 3V, the upper limit of 4.2V, 4.2-3 = 1.2V, the voltage difference between the lower limit of 1.2V, is the battery Analog power up LM3914 can accurately detect an analog voltage, and 10 LED display, display dot mode LED is lit 10 one, or in a stripe pattern individually lit LED Display Displays the battery voltage between the lower limit of 10 files showed that representatives of each of the lights 10% charge displays, on behalf of 10 lights display charge 0% -100% range; you can also change the single light display, is displayed only a light, more power, single-light power 4mA, all bright 42mA Equipment needed: an adjustable power supply, precision accuracy of the decisions of the panel display. Watches word screwdriver.