Apply stressful hands to help focus and think deeply and help patients with AD and ADHD relieve tension and anxiety‎‎.‎‎Wake up when driving in a long drive‎‎,‎‎ quit smoking‎‎.‎‎Enough in your pocket‎‎,‎‎ perfect size easy to carry‎‎,‎‎ play anytime and anywhereEasy to carry‎‎,‎‎ small‎‎,‎‎ simple‎‎,‎‎ separate and pleasant‎‎,‎‎ also effective for concentration and deep thoughtSafeWith LED light