Eavesdrop on nature: Build your own ultrasonic detector and make the ultrasonic calls of bats audible. This way, you can detect these fascinating flying artists in the dark even in places where they otherwise hunt for insects completely unnoticed.
Easy and fail-safe: The detector is assembled in no time. The circuit board is equipped with numerous SMD components. You only have to put a few parts together yourself and wire the circuit board with microphone, loudspeaker and the adjustment controls.
Go on a journey of discovery: Not only bats, but also numerous technical devices emit ultrasound. You will be surprised how many inaudible sound sources you are surrounded by.
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