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 Monitor Model: KM140F Material: ABS, Brass, Silicone Screen Size: 2.4 Inch Sampling Method: Shunt Voltage Testing Range: 10-100V Current Testing Range: 0-400A Current Resolution: 0.01A Capacity Display Range: 0-100% Power Testing Range: 0-40KW Power Resolution: 0.0001W Ah Testing Range: 0-9999.9Ah Capacity Resolution: 0.001Ah Bluetooth Connection Distance: Approx. 10m / 32.81ft Wifi Connection Distance: Approx. 10m / 32.81ft Remote Connection Range: Global Voltage Accuracy: ±5%+0.02V Current Accuracy: ±2+0.01A Sampling Rate: 5 times / second Display Power Consumption: 0.9W Screen Off Time: 10S, 20S, 30S, 40S, 50S, 60S, AUTO (Screen on when discharge current ≥30mA, screen off when discharge current 20s). Package List: 1 x Battery Monitor 1 x Sampler 1 x 1m Red Positive Wire 1 x 5m Communicating Line 1 x Manual Note: 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%, 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%. This way, the entire battery is properly set.