True 4-wire AC sine measurement, to effectively avoids the impact of test lines and contact resistance. Two functions interface, the old battery sorting function, low power consumption and a variety of power-saving options. Test range up to 200 ohms with a minimum resolution of 0.01 milliohms and le than 5 milliohms. Pre HOLD to enable the ZR function to measure internal resistance as low as 0.30-0. 50 milliohms. Features: Voltage resistance with the screen at the same time measurement, measurement quickly and steadily. The minimum resolution of up to 0.01 milliohms, easy to test large capacity, high discharge rate low resistance battery. Range can be 200 ohms, can be measured button batteries, 9V laminated battery and other low-capacity small current high internal resistance battery. Voltage, internal resistance test function, respectively, with manual automatic range function. Automatic range switch stable and quick, the measurement shows 4 times per second update, the basic can be locked in about 1S time range stable display. HOLD function to help you lock the display, more convenient reading. Using dot matrix LCD screen. Size font combination, which clearly shows the measurement results, but also display rich content. 2 kinds of display mode. Normal mode with the screen display resistance and voltage, sorting mode shows the interna resistance voltage and the level of battery claification and counting. Has a three-level battery rating detection. By setting the voltage resistance rating, the battery can be grouped. Built-in charging management circuit. And can be set to 200mA and 400mA two charging current. Energy saving function. Can be set 5 - 60min shutdown delay. No operation and input, the ultra-delayed automatic shutdown. Can be set to 5-30min delay into low power mode. Specifications: Material: plastics Voltage measuring range: 0-28V Internal resistancemeasuring range: 0-200 Battery: 3.7V, 2000mAh Package size: 120 * 60 * 40mm / 4.7 * 2.4 * 1.6in Package weight: 300g / 10.6ounce Packing List: 1 * Internal Resistance Test Instrument 1.product pictures are provided for old customers. 2.Wholesale/dropshipping both supported, please feel free to contact us if you need a more bulk price or faster shipping. 3.We ship worldwide by China post,HK post EMS,DHL, Fedex,and so on,according to your choice when placing orders.we are unable to control the delivery time,because it is proceed by the Third-party service. 4.Service transit time is provided by carrier and excludes weekends and holidays.Transit times may vary,particulary during the holiday season. 1. If anything makes you unsatisfied or angry, please contact us directly before leaving Feedback.We will do our best to solve the problem until you satisfy. 2. If you satisfy with the item, please add our store to favorite list and leave a positive feedback (5stars) to encourage us! ? 3. Please don't leave any negative or neutral feedback or open any dispute without any communication with