The reon pocket is a bluetooth device about the size of a card wallet that slips into a special undershirt with a pocket at the base of the neck. it connects to an app which gives users control of the temperature via their smartphone. The wearable air conditioner supports ios and android, has a battery life of 90 minutes and a charge time of 2 hours. It weighs 85 grams and uses USB-c. The Reon Pocket is out now exclusively in Japan. It costs 13,000 yen ($122) for the device itself, and the undershirts (available in white or beige) are 1,800 yen ($17) each. The app does work in English, if you’re looking to import.