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  1. Quick Stress Test Biofeedback Cards with No Logo (20 Pack)
    Credit card size, plastic temperature indicator. A liquid crystal square changes color as it is warmed by the finger, indicating Stressed, Tense, Normal or Calm. 20 cards per package. Learn More
  2. Used Mindfield eSense Temperature - Temperature sensor for iPhone & Android
    The eSense Temperature is a small sensor for measuring your skin temperature with the microphone input of your smartphone or tablet (Android or Apple iOS.). Learn More
    $69.00
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