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 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 real-time 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: 0A~50AVoltage: 0.01V~120VMeasurement range when powered by itself: 8V~120VMeasurement range when powered externally: 0~120VCapacity: 0.000AH~99999.9AHEnergy: 000.00KWH~5999.9KWHPower value 000.0~999KWDisplay mode: 2.4-inch color LCD displayWireless communication distance: 10 meters for a single group in open spaceMeasurement rate: 20 times/secondColour: 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 +/- 1-3cm.