Type of Topo Stop device Vermin infestation area Ultrasonic Resonance sound waves * Balkony, backyard, etc. 1st choice ---
One or several units of Topo Stop installed in backyards, gardens, etc. offering a proper surround effect (re-bounce of the sound waves) will effectively rid any larger bird such as sea gulls, gees, doves, etc. from the vicinity.
Product choice: Topo Stop E250 / Topo Stop E500