Excellent condition personal cooling and heating device. Pairs with an app for the most functionality but can also work without the app. Comes with original box and charger. Clinical research has shown that wearing the Embr Wave® provides relief from temperature discomfort and improves sleep. At the touch of a button, activate your thermal senses to change how you feel temperature through the use of precise cooling and warming sensations. Now, anyone can control their own thermal perfection - including the physical and mental well-being that temperature creates - thanks to the Embr Wave, the first personal, wearable, thermal system.