100 Biofeedback BIO-Squares
1/2" by 1/2" square of temperature sensitive material with strong adhesive backing.Stress Square CHANGES COLORS as temperature changes which is a test of stress level.BLACK= TenseRED= NervousGREEN= CalmBLUE= RelaxedUse adhesive back to stick the Stress Square to tense areas. Inexpensive and unbreakable,10 degree range from 81 F to 91 F. Great handout. These have a glue or an adhesive back. Simply peel them off. You can stick them on skin, letterhead, business card, student ID, or any promotional or advertising item.Stress Square Instruction sheet Body Temperature changes under Stress Under stress muscles tense and blood flow is restricted to the main body and shut down from the hands and feet.Stress Level Rule - Warm Hands Relaxed, Cold Hands Tense.Hand/foot temperature ranges over 40 degrees from a low of 60 degrees to as high as 99 degrees F. Changes of 5 degrees or more can take place in seconds.A package of 100 1/2" by 1/2" stress sensing Stress Squares comes with instruction sheet.Buy More Stress Square Instruction Cards  - Link: http://amzn.com/B007MELM4K