Black Box TECH LAB

Electromagnetic Canceller REM8

Features:Power supply voltage: 3-5V, or 2-4 AA batteries in seriesSize: 72mm*64mmOriginal product ad..

$125.00

Schumann wave resonance generator，Scalar wave

Schumann wave resonance generator1Used in audio-visual space-improve sound field and audio-visual ef..

$100.00