Fangrui Product Details 1.if You Need To Turn Off Information Monitoring, Please Long Press The M Key To Enter The Background And Turn Off The Information Prompt! 2. Battery Percentage ( Full Voltage And Low Battery Voltage) And Ovp (overvoltage Alarm), Lvp (low Voltage Alarm) Need To Be Set Separately, Which Can Be Set To The Same Value Or Different Values 3. This Product Is A Bidirectional Current, With A+symbol For Charging And A - Symbol For Discharging, Changed To The Direction Of The Arrow (charging Position Symbol, Discharging Symbol) 4. When Encountering Wifi Connection Failure, Long Press Them Key To Enter The Background And Select The Wifi Reset Option 5. The System Sound Can Be Turned Off Or On, Long Press The M Key To Enter The Background Settings Before Making A Purchase, Please Read This Paragraph Carefully To Avoid Any Misunderstandings. Thank You! The Capacity Tested For This Product Is The Total Capacity, Which Is The Accumulated Data! Whether In Charging Or Discharging Mode, If The Data Is Not Res