3 in 1 battery voltage meter - With a switched function button to choose the battery capacity, real-time voltage or turn off; New alarm function, when the battery capacity is lower 20%, the screen display will flash to alarm.(Note: package only include1 battery meter ) Universial battery status monitor - wide working voltage input range DC 12V-84V.Can be automatically detect to the accurate voltage according to the battery voltage. Suitable for various battery types - fits to 12V/24V/36V/48V/60V/72V/84V lead acid battery, Ternary Lithium battery, Polymer lithium-ion battery, 3-15 series Lithium ion battery, Storage battery, Water battery, etc. (Note: it cannot be used for LithiumIron Phosphate batteries, 1-2 Li batteries in series and over 15 Li batteries in series.) Sensitive LCD digital display - the small battery voltage reader with a PVC waterproof screen poterctor, clear and bright green backlight LCD display from any angle; Low working power consumption(5mA max), in additional there's a turn off button for it. Multifunctional application - suitable for (Yamaha) golf cart, RV, marine, boat, (EZGO) club car, motorcycle, car, bike, ebike, scooter, truck, vehicle, jet ski, forklift