The Magic BlackVue power pro allows to operate the park mode of the BlackVue Dashcams without the car battery becomes discharged too much. With adjustable operating time and the minimum voltage. Thus, the discharge of the car battery is avoided, so you can start your car always safe. The connection is made directly to the fuse box of the car, so the operation of the Dashcam is also guaranteed if the ignition is off. Installation should only be performed by an experienced professional. If you are unsure ask your garage owner.