Usage Tips:MORE DATA CAPTURED: Displays the state of charge (%), remaining battery capacity (up to 999Ah), charge and discharge current (A), voltage (V), and low voltage alarm. This information helps optimize battery usage, enhancing battery lifespan and reducing the risk of failure. MULTIPLE USES: Compatible with all kinds of batteries including lithium, LiFePO4, lead-acid, and others, supporting current level 10A-100A and voltage level 9.5-100V. Perfect for RVs, golf carts, fishing boats, balance cars, solar panels, and more. It features a waterproof, battery monitor with a shunt. WIRING WITH SHUNT: The shunt is made of solid copper, featuring low resistance to minimize energy loss during measurements. It can handle currents up to 100A. The 3 meter (9.85 feet) shielded wire enhances signal stability and prevents interference. DATA STORAGE: It has zero/full capacity setting function for Voltage/Ah/Capacity/Current, which can automatically store the last measurement when system shuts off. DISPLAY: It uses digital display LCD with backlight, equipped with a strengthened Acrylic waterproof screen. It displays V/Ah/A/SoC and remaining capacity bar, which shows the state of battery clearly. LOW VOLTAGE ALARM: As an optional function, the low voltage alarm work when battery power is less than the pre-setup alarming voltage. Digits start to flash to remind you that the battery needs to be . LOW POWER CONSUMPTION: This battery fuel gauge has a very low power consuming rate, at normal mode, its self-current consumption is below 15mA, while low-power-consumption working sleep mode is below 1mA. Colour:black Material:plastic Package Contents: 1 * battery monitor 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.