Aimilar Mini 12V 24V LED Battery Indicator Gauge Meter for Motorcycle Golf Carts Car Marine ATV This battery indicator can work on general 12/24V lead acid storage battery. It has a powerful battery level testing system and unique design. This battery meter suit for 12V or 24V lead acid storage battery. And voltage 12V and 24V will automatically identified according to battery's voltage. No need operation by user. It will be automatically sleep after 30 seconds no operation. This design will help save more energy. Used for: Motorcycle, golf carts, car, marine, ATV,etc. SATISFACTION GUARANTEED: 30-Day money back and 2-Year warranty.