Solar mole repellent set of 2

It is repelled by the sonic vibrations that it dislikes. ● Operates by charging sunlight with a solar panel. Energy saving with no electricity bill required. ●Just insert it into the soil! ●Effectiveness is up to approximately 50 square meters ●Solar panel, built-in battery [Specifications] ●Power source: 1 rechargeable nickel metal hydride battery (built-in) ●Frequency 400Hz ± 50Hz ●Size (1 piece): (approx.) Width 8 x Depth 9.5 x Height: 38.5cm ●Weight (1 piece): (approx.) 150g ●Material: polypropylene ●Made in China