【Multiple Safety Protection】The charger has multiple safety functions: fireproof flower, low voltage protection, overvoltage protection, overcurrent protection, reverse connection protection, short circuit protection, overheat protection, guarantee your safety. English: The smart charger contains a fan, it prevents overheating during charging and extends the life of the car charger. 【Smart LCD Display】The charger automatically recognizes the current voltage and requires no manual operation. The screen can display voltage, current, battery capacity, temperature, etc. It is possible to know the charging status of the battery. When charging, the red clip is used to fix the positive (+) battery with the black clip to fix the negative (-) battery. Automatically stops charging after charging is complete. 【Widely Used】Suitable for lead-acid batteries, batteries for 12V 6-150Ah, 24V 6-100Ah (AGM, GEL, WET, SLA, VRLA). Diagnose and repair battery problems and extend battery life. For cars,