Drives away martens using high-voltage plates charged to approximately 200 - 300 V, which generate electric shocks in the vehicle's engine compartment. These are mild electric pulses that only scare the marten away without causing harm. Additionally, strong, aggressively pulsating ultrasonic tones are employed. The device automatically shuts off when the battery voltage drops below 11.5 V/DC. The base unit with ultrasonic sound emission is waterproof according to IP 65 and can be mounted directly at the marten's entry point in the car. It features a built-in, brightly flashing LED.