Review: Mantra Biofeedback System - Stuff.co.nz
Review: Mantra Biofeedback System - Stuff.co.nz

Stuff.co.nz
Review: Mantra Biofeedback System
Stuff.co.nz, New Zealand -
The Mantra system measures relaxation by monitoring your pulse rate via a special mouse plugged into a computer's USB port, working out your heart rate. …
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