the reon pocket utilizes thermoelectric cooling but sony says you can also use it as a heater on winter days. it can supposedly cool a user's body temperature by 13 degrees celsius (23 degrees fahrenheit) and raise your temperature by about 8 degrees celsius (about 14 degrees fahrenheit).
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 looks a little like an apple mouse, weighs just 85 grams and uses USB-c.
It's a similar concept as the Embr Wave, which is a wearable bracelet that also heats and cools, but sells for more than double the price at $299. I imagine the Reon Pocket is more effective since it sits at your neck/back versus your wrist, but the problem is you have to wear that stupid undershirt to make it work. Although I suppose you could skip the shirt and just tape it to your back like John McClane in Die Hard. Yippee ki-yay, you poor sweaty bastards. I've got a weird device taped to my back and that makes me cooler than you. Literally.
Keep going for the product video or check out the main Japanese site here.