Features: 【6V/12V Smart Switch】Automatically identify and switch the 6Volt or 12 volt battery without manual adjustment, and damage the battery. 【Battery Pulse Repair】Built-in advanced battery REPAIR technology, helps to restore the old/idle batteries lost performance and extend battery life. 【Full of Self Stop】The charger clip clamped to the battery , the red"+",the black"-"electrode , don't need adjustment, the CPU is precisely controlled and the multipule protections are fully automatic stop so you can use it at safe 【Safer Alligator Clip】Rugged and durable, alligator clip wrapped in insulating material.The use of international standard pure copper wire can output current stably, even if the charging wire is used for a long time, it will not generate heat and is not dangerous.