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The DAVID Delight Pro provides a unique fusion of audio-visual entrainment (also known as brainwave entrainment) and cranial-electro stimulation (CES) with sophistication and simplicity. Learn More
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
Temperature indicator, credit card size in durable plastic. Liquid crystal square turns color as it is warmed by the finger. A color grid on the card compares the crystals color to Stressed, Tense, Normal or Calm. Ideal for referral or promotion. Learn More