The one with rat control

We recently bought a pest shield equipment we found at SM department store.  I'am so bugged with the houserats that kept going in our house because they have found a hole or a drainage maybe that we can't get thru in (so we'd be able to cover it) because it's behind a cabinet.  i hate those rats! eeky i know but i only found one small and one medium-sized one. eewww!!! anyway, the pest shield is supposed to shoo them away because of the vibration it emits. so far, we plugged the shield for four days now and i have'nt seen the two rats again.  They've destroyed a part of the kitchen door as well since the kitchen door didnt have a kick plate, the rat was able to mu