Fangrui Product Details 1. Aermotor Bm300 Bluetooth 12v Car Battery Tester Battery Analyzer 2. It Is An Application Assistant Specifically Designed For Automotive Battery Batteries. This Is A Practical App, Users Can View The Real-time Voltage And Other Relevant Information Of The Car Battery In Real Time Through The Mobile Phone. 3. The Voltage Of The Car Starting System And Charging System Can Be Monitored In Real Time, Helping Users To Fully Understand The Data And Characteristics Of The Car Battery Battery. 4. Transfer Data To The Phone Via Bluetooth And Enter The App For Real-time Viewing. 5. Low-power Protection Chipeffectively Protect The Power Consumption Of The Battery, The Voltage Exceeds 20v Or The Product Temperature Exceeds 60 Degree Celsius The Chip Will Enter The Protection Mode And Stop Working.wait For The Voltage To Be Normal And The Temperature To Be Normal And Continue Normal Operation. 6. Parameters: 7. - Working Voltage: 6v-18v 8. - Working Temperature: -40-60 Degree Celsius 9. - Languages: Chinese, Traditional Chinese, Korean, Japanese, English, Czech, Spanish, Spanish, Italian, Romanian, Polish, Slovak, Russian, German, French