Franzis Franzis Bat Detector Kit

Franzis Verlag GmbH 4019631150493 Bat Detector Kit ColourfulDescription: Listen to nature with modern electronics! Assemble your own premium ultrasonic detector. Easy build kit circuit board with many components already mounted. Simple connections - no soldering required. Once built start discovering! Listen to the sound of bats as well as other th... moreings that emit ultrasound. You'll be surprised at the number of usually inaudible sounds that surround us every day. Build this Haynes Build Your Own Bat Detector Kit and give your ears superpowers! Required: 9V battery for up to 25 hours observation time. Box contains: Assembled board Speaker 8-ohm Ultrasonic microphone 40 kHz Battery clip 9 V 2 rotary knobs