1. Fast results: Since this mole repellent technology is efficient, you can distribute the two mole and vole repellent in the case of already existing infestation of pests, so that moles and voles have an escape option from your garden. For pure prevention, the set can then be placed in the middle at a distance of approx. 12 metres 2. Large effective radius: the operating radius is approx. 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 mole repellent up to approx. 2 cm in front of the edge completely into the soil. So you can achieve good and quick effect 3. Thanks to solar power without follow-up costs: the Grundig solar mole deterrent is charged via efficient solar panel and is fed into a 1.2 V Ni-MH battery. So you can bridge on rainy days and no longer have to worry about changing batteries and battery costs 4. Waterproof and corrosion-resistant: the sturdy ABS design is particularly waterproof according to IP56 and extremely corrosion resistant in contrast to metal sleeve solutions. So you can enjoy your effective mole repellent for a long time 5. Box contents: Grundig mole repellent pack of 2 solar set with multilingual instruction manual (English language not guaranteed). Ready to use and comes in a coloured box, making it suitable for giving as a gift