Ultrasonic unit with 12-volt connection. The only marten repellent device which is suitable for CAN bus without hesitation! Thanks to intelligent technology, the so-called falling asleep of the CAN bus is not prevented. So no more empty batteries. The equipment with double mini loudspeakers protects every smallest corner against marten bites. Due to constantly changing tones, the marten cannot get used to it and is permanently sold reliably. The sounds are not audible to humans. Maintenance-free processing thanks to water-protected and shock-resistant encapsulated electronics. Absolutely reliable. The top device for marten repellent. Connecting cable for 12V. CAN bus compatible. Frequency range 22 - 28 kHz. Sound pressure approx. 105 dB. 2 high-quality piezo loudspeakers. Simple installation (pre-wired), maintenance-free, splash-proof, shock-proof. e1 approval.