["FEATURES\r\nThe battery internal resistance tester can measure internal resistance and voltage of the battery at the same for time. The Kelvin four-wire test clamp is adapted in order to better avoid the influence of contact resistance and wire resistance, and more accurate measurement can be performed\r\nThis product adopts intelligent contrl, liquid crystal display, and simultaneous insertion of Kalman flter mathematical algorithm, which has the advantages of high precision, high eficiency, low cost, light weight, energy saving and environmental for protection. Built-in 1000mAh lithium battery,5V charging. Android mobile phone charger can be used, which is very convenient. \r\nThis product is widely used in various battery production, maintenance, testing, scientific research laboratories and other occasions.It can also be used to measure AC resistance of capacitors and resistors with low resistance and high precision.\r\n\r\nSPECIFICATIONS\r\nParameters Accuracy:AC resistance, for DC voltage, R:0.5%, V:0.5%\r\nMeasurement Range,Signal SourceRange: \r\nR:0.01mQ ~200MV:0.001V~t75VDCV\r\nAC:1kHz At 20m@ range:50mA At 200mQ/ 2Qrange\r\n5mA At 20Q/200Q range:0.5mA\r\nR:Automatic and Manual.5ranges\r\nV: Automatic and Manual,3 ranges\r\nSpeed:10 times/second\r\nAdjustment: Correction for resistance and voltage separately\r\nFactory Setting: Save factory information, restore factory state with one key\r\nBacklight: Can turn it on/off by entering setting menu\r\nEnergy Saving Settings: 30 minutes delay, it will be turned off automatically if no operation\r\nApplication: Battery maintenance for mobile, computer, battery car;battery factories check and test\r\nResult Display: LCD display, direct reading\r\n\r\nGENERAL FEATURES\r\nPower Supply: Built-in lithium battery, Be suitable to use5V1A Android mobile phone charger\r\nSize: 166mm (Length)~80mm(Width)28mm(Height) 173.5g\r\nLanguage:English and Chinese switchable\r\n\r\nNote: \r\n1. calibrated before shipment, please do not arbitrarily restore the factory\r\n2. If you need software, please contact us.\r\n\r\nPackage include:\r\n1* Battery Internal Resistance Tester \r\n1* Test clip\r\n1* User’s manual"]