Feature:1. Remote And Accurate Testing: The WiFi enabled RV battery monitor supports remote real time monitoring via APP, WiFi, and Bluetooth connectivity, allowing users to check the battery status anytime, anywhere using their mobile devices. Say goodbye to traditional close range monitoring methods and effortlessly control battery conditions whether for outdoor, household electricity use, or other scenarios.2. 2.4 Inch HD Color LCD Screen: The battery capacity voltage indicator features an optimized interface with larger, clearer text and responsive silicone keypad for slick operating and comfortable tactile feedback. With dark and light modes, the display ensures clear visibility of information in any lighting conditions.3. Real Time Display: The battery voltmeter ammeter is a versatile Coulomb meter that measures various physical parameters such as voltage, current, power, charge discharge capacity, watt hour, and time. It offers multiple guard functions including over voltage, under voltage, over current, over power, over temperature, and time limited guard by setting parameters accordingly.4. Built In Buzzer: The battery capacity voltage monitor gauge is equipped with a buzzer that reminds users immediately upon reaching preset low capacity or voltage levels. This feature, along with pop up notifications, helps users stay informed of device status and prevent unexpected incidents.5. Good Compatibility: Compatible with Li iron P, Li ion, Ni metal hydride batteries, and other battery types, the battery voltage current meter is suitable for batteries with voltages ranging from 10-100V. Enjoy peace of mind and ensure safety with our versatile and user friendly battery monitor.Specification:Item Type: Battery MonitorModel: KM140FMaterial: ABS, Brass, SiliconeScreen Size: 2.4 Inch Sampling Method: ShuntVoltage Testing Range: 10-100VCurrent Testing Range: 0-400ACurrent Resolution: 0.01ACapacity Display Range: 0-100 percent Power Testing Range: 0-40KWPower Resolution: 0.0001WAh Testing Range: 0-9999.9AhCapacity Resolution: 0.001AhBluetooth Connection Distance: Approx. 10m or 32.81ftWifi Connection Distance: Approx. 10m or 32.81ftRemote Connection Range: GlobalVoltage Accuracy: 5 percent and0.02VCurrent Accuracy: 2and0.01ASampling Rate: 5 times or secondDisplay Power Consumption: 0.9WScreen Off Time: 10S, 20S, 30S, 40S, 50S, 60S, AUTO (Screen on when discharge current 30mA, screen off when discharge current andlt 30mA and time andgt 20s).Package List:1 x Battery Monitor1 x Sampler1 x 1m Red Positive Wire1 x 5m Communicating Line1 x ManualNote:Before first use, you need to correctly set the battery's effective capacity and current remaining battery percentage. If the battery's effective capacity or current remaining battery level is unknown, follow these steps: 1. Charge the battery fully. 2. Enter the preset battery capacity setting in the system settings, for example, if the battery's rated capacity is 150AH, set 150AH as the preset battery capacity (you can check the rated capacity on the battery nameplate or consult the battery manufacturer). 3. Set the remaining capacity percentage to 100 percent , then discharge the battery group. 4. After discharging, the remaining capacity value displayed on the monitor is 10AH. The preset capacity value of 150 minus the remaining 10 equals the actual battery capacity of 140, meaning the battery has discharged a total of 140AH and cannot be fully discharged. Therefore, set the actual discharged capacity of 140AH as the preset capacity, and set the capacity percentage to 0 percent . This way, the entire battery is properly set.