Always Listening
With this kit, you can easily built a powerful listening device that is perfect for animal voices and quiet noises.
The manual clearly guides you through the assembly. No previous experience is required. Ideally suited for all hobby investigators and tinkerers interested in technology.
Additionally required
1x 9 V battery
Headset with 3.5 mm phone jack
For your next Undercover Mission
With this technological gadget, your voice is guaranteed to remain unrecognizable.
The voice changer modifies the frequencies of your voice so that even your best friends won't recognize it.
The ideal tool for remaining 'undercover' or playing a prank!
Additionally required
1 x 9 V battery
