Ancel BST100 12V Car Battery Tester 1. Voltage: 12V 2. Working temperature: -20 - 40 degrees Celsius 3. Using STM-32 chipset hardware, the operation speed is fast and the use is smooth. 4. The test results are accurate, using high-precision amplifiers, calibrated by professional battery test tools, and the reading accuracy of BST100 is as high as 99%. 5. Wide testing range, covering CCA 100-2000, 3-220 AH, the best in the market. 6. Support graphical real-time monitoring of battery voltage, which can analyze battery data more accurately. 7. Test all lead-acid batteries for automobile starting, including ordinary lead-acid batteries, AGM flat batteries, AGM spiral batteries, gel batteries, etc. 8. Polarity reverse protection, reverse polarity will not damage the tester or affect the vehicle and battery. 9. Testing standards include most of the current battery standards in the world: CCA, BCI, CA, MCA, JIS, DIN, IEC, EN, SAE, GB. 10. Can test various 12V batteries (Starting [SLI], Deep Cycled and Marine) Wet (Flooded), VRLA or Maintenance Free (MF), Sealed Maintenance Free (SMF), Absorbent Glass Mat (AGM) ) and GEL EPB battery.