Features: Ranges: This tester has a measuring ranges of 0.01m~200. Compared with traditional battery internal resistance testers, it has a measuring ranges and a ranges of applications. Low Resistance Measurement Function: Short press the power button to turn on the low resistance function, and measure the internal resistance of 0.30-0.50 milliohms. Various Battery Tests: This tester can measure lithium ion, lithium polymer, lithium iron phosphate, alkaline, dry battery, nickel metal hydride, nickel cadmium, button battery, etc. Portable Size: This battery internal resistance tester with portable size and easy to carry, you can share this product with your friends and families. Built-in Battery: This tester has a built-in capacity lithium battery to supplys power, you can recharge it in time when the battery voltage is under 3.5V. Screen Backlight&Automatic Shutdown: The backlight of screen is adjustable and you can setting the automatic shutdown time according to your needs. Voltage&Internal Resistance Display: The voltage and internal resistance are displayed on the screen, and the ranges can be manually and automatically switched. Specifications: Measuring ranges: 0.01m~200 Resolution: 0.01m Battery: 1 * lithium battery, 400mAh (included) 20m: Minimum resolution: 0.01m Accuracy: 0.7%+7 200m: Minimum resolution: 0.1m Accuracy: 0.5%+5 2: Minimum resolution: 1m Accuracy: 0.5%+5 20: Minimum resolution: 10m Accuracy: 0.5%+5 200: Minimum resolution: 0.1 Accuracy: 0.6%+5 Voltage measuring: Ranges: 6V Minimum resolution: 0.001V Accuracy: 0.1%+5 Ranges: 45V Minimum resolution: 0.01V Accuracy: 0.1%+5 Style: B Material: Plastic colour: As shown Package Contents: 1 set x Battery Internal Resistance Tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.