Dual setting possibilities

The professional model of Topo Stop has two modes of operation. One for humans fully audible sound (6-9 kHz) with a long range effect into every nook and cranny, but with the side effect of being disturbing also to man. This setting is therefore suitable for use in inhabited spaces like closed summer houses, warehouses, well insulated attics as well as closed crawling spaces. With the second setting Topo Stop will emit ultrasonic signals (25-30 kHz) at random.