Schumann Resonator unit

Housed in ABS casing.

You need a DC power source. 9-15VDC >100mA is okay. Plug size of 1.6mm with center pin being positive.

No soldering, no messing around, just plug and play.

Price is low as these are from the older PCBs and I'm clearing them off.

Circuitry is the same in new PCB but new PCB is easier to assemble.