WindCore cool vest with instant cooling to -28°C and instant heating to -49°C, FREE SIZE. - Brand: WindCore - Model: PRO model - Cooling temperature: Instant cooling -28°C - Heating temperature: Instant heating -49°C - Battery capacity: 20,000mAh - Size: FREE SIZE - Features: 5-point cooling/heating function Thank you for viewing. In the last photo, the part taken from the back, the left Peltier holder is missing. The Peltier is connected by a cable when worn, so it won't fall off, but please be aware of this if you are concerned.