Advanced Monitoring: This Hall Bluetooth voltage and current meter features a 2.4inch color screen for clear and accurate readings of your electric car or RV's battery statusMore Accurate Measurement: With charging overvoltage, discharging undervoltage, charging overcurrent, discharging overcurrent protection, with buzzer alarm prompt functionBluetooth Connectivity: Easily monitor battery performance remotely via Bluetooth, ensuring you always have realtime data at your fingertipsWide Application: This meter is suitable for a variety of electric vehicles and RVs, helping to effectively manage battery capacity and lifespanReliable Battery Management: Accurately tracks voltage, current, and battery capacity to help prevent overcharging and battery damageCurrent: 0.02A~100AVoltage: 8V~120VCapacity: 0.1AH~99999AHPower value: 60KWDisplay mode: 12864 LCD displayWireless communication distance: 10 meters per group in open areaCommunication baud rate: 9600bpsMeasurement rate: 20 timessecondColour: As ShownMaterial: PVCPackage Contents:1 x Coulomb Meter KitOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is + 13cm.