Advanced Monitoring: This Hall-effect Bluetooth voltage and current meter features a 2.4-inch color LCD display for clear and accurate readings of your electric vehicle or RV battery status More Accurate Measurement: Includes overvoltage protection during charging, undervoltage protection during discharging, overcurrent protection during charging and discharging, with buzzer alarm notification Bluetooth Connectivity: Monitor battery performance remotely via Bluetooth for real-time data access Wide Application: Suitable for various electric vehicles and RVs to help manage battery capacity and lifespan Reliable Battery Management: Tracks voltage, current, and battery capacity to help prevent overcharging and battery damage Current Range: 0A–50A Voltage Range: 0.01V–120V Measurement Range (self-powered): 8V–120V Measurement Range (externally powered): 0V–120V Capacity Range: 0.000Ah–99999.9Ah Energy Range: 000.00kWh–5999.9kWh Power Range: 000.0W–999.0kW Display: 2.4-inch color LCD Wireless Communication Distance: Up to 10 meters in open space Measurement Rate: 20 times per second Color: As shown Material: PVC Package Contents: 1 x Coulomb Meter Kit Note: Color may vary slightly due to lighting and screen settings. Measurement tolerance: ±1–3cm.