In case of marten problems in the car, the device can be connected to the car battery using the included cable. If a battery connection is not desired or if the device is to be used outside the engine compartment, it can also be powered by standard AA batteries (not included). It is ideal for marten issues in the attic. The device emits high-frequency sounds at 30-second intervals to disturb martens, making other places more appealing to them. Additionally, an LED flash occurs at 60-second intervals. The Marder-Frei Dual has a built-in vibration sensor that turns off the device during vibrations for energy-saving use in the engine compartment. Cable ties and mounting screws are included for installation.