Battery charging status indicator with hour meter - features two LED displays showing battery charging status graph, voltage, power volume percentage, or operating hour count. Suitable for lead-acid, SAL, and li-ion batteries in electric vehicles, boats, sweepers, and forklifts. Please note: For li-ion or lifepo4 batteries, you'll need to know your battery pack's xSxP information. To change settings in the menu, enter 7 in the PAS o menu to unlock it. Display Contents: Battery remaining power volume LED bar with four colors (blue, green, yellow, red). Battery voltage (V). Battery charge percentage (%). Hour count (H). Specification: Display: 10 LED bars (1 blue, 4 green, 3 yellow, 2 red LEDs) + 3 digital digits. Operating voltage: 5-100V. Operating current: Less than 20mA. Operating temperature: -20C to 85C. Dimension: housing 60mm, cutout 50-52mm, U-clamp: 62x25x10mm