Medium Surface Transducer with Wires - 4 Ohm 3 Watt Brand_CamJam You just stick the inconspicuous

You just stick the inconspicuous black PCB into your plant's soil with a CR2032 battery in it

8" diagonal) bright (4 white-LED backlight) and colorful (18-bit 262

essentially

Breadboard compatible for easy prototyping and testing

Medium Surface Transducer with Wires - 4 Ohm 3 Watt Brand_CamJam You just stick the inconspicuousTurn any surface wall table etc into a speaker with a surface transducer. This type of speaker does not have a moving cone like most speakers you've seen. Instead, a small metal rod is wrapped with the voice coil. When current is pulsed through the coil, the magnetic field causes a piece of metal to expand and contract and if it's pressed against a surface it turns the transducer into a speaker! Often these size transducers are pressed up against a