BRAND NEW Embr Wave Bracelet | Wearable Warming and Cooling Device by Embr Labs Experience thermal comfort on demand. Developed by MIT scientists, Embr Wave lets you cool down when you’re too hot or warm up when you’re too cold. Embr Wave is powered by patent-pending technology that uses cutting-edge thermoelectrics and precisely engineered algorithms to produce maximally effective temperature waves. It fits comfortably around any wrist size, and lasts 2-3 days per charge.