Step-down converter: Input voltage: DC 18V-20V; Output voltage: DC 12V; Output current: 20A Max; Output power 240W Max. Built-in over and low voltage protection, automatic shutdown if battery voltage is lower than 14.4V, protects your battery and 12V devices. Compatibility: Perfectly compatible with 18V lithium batteries, works with 48-11-1815, 48-11-1850, 48-11-1820, 48-11-1840, 48-11-1815 etc. Our battery adapter plug is well-designed, fits tightly to your battery, easy to install and remove. Better safety: Voltage regulator built-in smart chip, has overcurrent, overvoltage, undervoltage, overload, low load, short circuit, overheating, multiple intelligent protection, protects your devices from excessive damage. The battery adapter also has added fuse holder and 30A fuse, ensuring you can use it safely. Easy to use: We combine the battery adapter and voltage converter with 2 heat-resistant wires and fuse holder, more easy to use, just install the battery to the battery adapter and then connect the voltage converter to your device. (Note: Battery NOT included) Widely applicable: This converter is suitable for various 12V devices, perfect for upgrading power tools, toy cars, golf carts, car trucks, speaker, monitoring equipment, LED strip lights, work lights or robotics DIY etc. Color: red Material: plastic Package contents: 1 x Converter 1 Wheel Battery Adapter 1 x terminal 3 x 30A Fuse