Advanced Monitoring: This Hall Bluetooth voltage and current meter features a 2.4-inch color screen for clear and accurate readings of your electric car or RV's battery status More Accurate Measurement: With charging overvoltage, discharging undervoltage, charging overcurrent, discharging overcurrent protection, with buzzer alarm prompt function Bluetooth Connectivity: Easily monitor battery performance remotely via Bluetooth, ensuring you always have real-time data at your fingertips Wide Application: This meter is suitable for a variety of electric vehicles and RVs, helping to effectively manage battery capacity and lifespan Reliable Battery Management: Accurately tracks voltage, current, and battery capacity to help prevent overcharging and battery damage Current: 0.02A-100A Voltage: 8V-120V Capacity: 0.1AH-99999AH Power value: 60KW Display mode: 12864 LCD display Wireless communication distance: 10 meters per group in open area Communication baud rate: 9600bps Measurement rate: 20 times or second Colour: As Shown Material: PVC Package Contents: 1 x Coulomb Meter Kit Only 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 1-3cm.