1. Compatible with children's vehicles: Supports electric cars, motorcycles, quadricycles, SUVs, and children's small tractors. 2. Easy to operate: 2.1 x 5.5mm DC plug, internal front, external negative - easy to insert and charge. 3. Only applicable to lead-acid batteries: Ensure that your child's vehicle uses a 12V lead-acid battery. Not applicable to lithium batteries and other types of batteries. 4. Maximum safety: Integrated protection function can prevent overheating, over electricity, short circuit, and overload. 5. The LED charging indicator light is clearly visible: the red LED indicates the charging process, and the green LED indicates that the battery is fully charged, always clearly visible.