You can not install only use to start the car, better still you can simply put in your pocket and take on holiday, short trips, camping or hiking, because it can also be a cell phone or smartphone with USB charging reliably and safely , Who knows more time where the next power supply is?
Useful and very useful is last but not least the built-in flashlight with 3 modes. In a breakdown, for example, makes perfect sense.
Recharging the Power Bank is among other things possible in the car socket by included adapter.
The instructions are simple and clear.
I recommend starting aid further, because it is versatile and useful.