Product Description Enhance your RV battery management with our advanced 2.4" Color Screen RV Battery Tester Monitor. Designed for 0-120V lead-acid, lithium, and iron-lithium batteries, this monitor offers unparalleled accuracy and convenience. Clear and Easy to Read: The 2.4-inch color screen provides a larger and clearer display, making data reading effortless. Accurate Measurement: Automatically identifies current in both charging and discharging directions. Uses current * working time to calculate capacity, ensuring higher accuracy than voltage-based methods. Bluetooth Connectivity: Connect to your meter via the mobile app (Android only) for real-time data viewing, parameter settings, firmware upgrades, and historical data export. Premium Materials: Built with pure copper shunt and screws for durability, with low power consumption in standby mode. Comprehensive Protections: Configure with a relay (not included) to enable over-voltage, under-voltage, over-current, over-temperature, and over-power protections. Self-Calibrating: Calibrate voltage, current, and temperature parameters easily for precise readings. Flexible Installation: The display connects to the measurement module through a 5.0-meter telephone line, extendable up to 30 meters for convenient setup. Wide Compatibility: Suitable for 0-120V lead-acid, lithium, and iron-lithium batteries, covering a broad range of applications. Specifications: Material: ABS Voltage Measurement Ranges: 0-120V (External), 10-120V (Self-powered) Voltage Resolution: 0.01V Current Measurement Ranges: 0~400A Current Resolution: 0.1A Temperature Measurement Ranges: -20~120 AH Measurement Ranges: 0~9999.99AH Voltage Accuracy: 2%+3 digits Current Accuracy: 5%+10 digits Bluetooth Communication Distance: 10M Package Size: 250 * 180 * 55mm / 9.8 * 7.1 * 2.2in Package Weight: 600g / 1.3lb Call to Action: Order now to experience the ultimate in RV battery monitoring and management. Ensure your batteries are always performing at their best with our feature-packed tester monitor.