amazon评价不错但我怀疑是托。ebay查得此类产品:
Effective Range: 7000 sf / 650M2 Frequency: 400-1000 Hz Rechargeable battery included: 1.2V 600MAH Ni-cd Solar Panel: 4.5V45MA
就是声波而已功率很小,如何能穿透土壤赶走动物?