Expansion kit for existing Audi Genuine Accessories Marten/rodent repel system. So that Martens/rodents do not make themselves at home in your vehicle. Costly damage to vehicle components can occur from Marten/rodent bites these may also cause failure of important functions. The installation kit to expand the existing Marten/rodent repel system can greatly improve the effectiveness of the system. The battery operated high-voltage unit with bipolar stainless steel contact plates is expanded by 2 additional high-voltage plates. An electrical connection to the vehicle onboard supply is not required. Additionally ultra-sonic sound is employed for the defence which does not harm the animal. Items supplied: 2 high-voltage plates 2 securing plates 8 securing screws (black plastic) 4 contact screws (metal, colour silver) Notes: Only usable in combination with Audi Genuine Accessories Marten/rodent repel system We recommend that installation is carried out by a specialist workshop