Product description: Easily drive away martens with ultrasonic technology. This can be quite annoying: bitten cables in the engine compartment or nocturnal rumbling in the attic. Drive away and keep martens away permanently with innovative ultrasonic technology. MarderStopp 50 m² drives martens out of cars, caravans, attics and garages immediately and permanently with the help of ultrasonic waves, without harming the animals. The device is powered by batteries and is therefore independent of other power sources.MarderStopp 50 m² emits varying ultrasonic waves, which are perceived as annoying by martens. For humans and pets, these ultrasonic waves are not or hardly perceptible. Advanced ultrasonic technology creates an unbearable environment for the marten, which is why it leaves and avoids this area. Due to the continuous change of the specific ultrasonic waves, the martens cannot get used to the disturbance. Extra tip: Also use the innovative Sugan Rats and Mice Stop ultrasound devices for 3 room sizes to keep the unpopular rodents away permanently. Spiders disappear from basements, attics and living rooms with spiders' stop. Application:for: attics, garden sheds, sheds, garages, cars, caravansagainst: martenFeatures:drives martens out of cars, caravans, attics and garages hygienically, immediately and permanently for rooms up to 50m² constantly changing ultrasonic frequencies prevent a habituation effect Battery operation harmless for humans and pets Packaging consists of over 90% recycled paper innovative ultrasonic technology drives away martens works immediately and protects constantly throughout the year (in case of Continuous operation) without approval and harmless for children and petsInstructions for use:Place the ultrasound device in the area where you suspect or want to prevent a marten infestation. The device is powered by 3 LR14 (alkaline) batteries. To insert the batteries, unscrew the back of the device and place the batteries in the battery compartment (make sure the polarity is correct +/–). Toggle the ON/OFF switch to ON to turn on the device. A blue light-emitting diode on the device begins to flash. If the blue light-emitting diode no longer flashes, the batteries should be replaced. The battery life is approximately 5 months, depending on the quality of the batteries and the ambient temperature. Period of application: all year roundPackage size: 1 pieceUse by non-professional users permitted. This product information does not replace compliance with the instructions for use and does not claim to be complete. Always read the label and product information before use. Observe warnings and symbols in the instructions for use.