Usage Tips: Fast results: Since this repellent technology is efficient, you can distribute the two devices in the case of an existing pest infestation, providing an escape option for moles and voles. For prevention, the set can be placed in the middle at a distance of approximately 12 metres. Large effective radius: The operating radius is approximately 920 m2 for the pack of 2. Please consider foundations, flower bed borders and other barriers when planning. The devices send out ultrasonic waves. Please insert the repellent up to approximately 2 cm in front of the edge completely into the soil to achieve the best and quickest effect. Thanks to solar power without follow-up costs: The deterrent is charged via an efficient solar panel and is fed into a high-quality 1.2 V Ni-MH battery. This allows it to bridge rainy days without the need for changing batteries. Waterproof and corrosion-resistant: The sturdy ABS design is particularly waterproof according to IP56 and is extremely corrosion resistant. Box contents: Mole repellent pack of 2 solar set with multilingual instruction manual. Ready to use and comes in a coloured box.