• Easy Build Bat Detector
• Assemble your own premium ultrasonic detector
• Easy build kit circuit board - no soldering required
• Listen to the sound of bats as well as other things that emit ultrasound
• Required: 9V battery for up to 25 hours observation time (not included)

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 things 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