Set Contents Vest for Peltier Cooler Full Set for Peltier Cooler 　Peltier Cooler: KS-1003 x 3 　Mini Battery: KS-110 　Y-Cable: KS-1005 　AC Adapter Charger: KS-106 　Instruction Manual Absorbs heat and cools from the back of the neck and both sides. Cools the body by making the metal surface cold. Further enhances coolness when combined with an air conditioning fan!! Cooling effect of up to approximately -18°C below ambient temperature! ※Varies depending on usage conditions and environment. Quiet: Can be used anywhere because it doesn't make a sound like an air conditioning fan. Lightweight: Doesn't feel like a burden even when worn for long periods. Instant Cooling: Feel the coolness in about 5 seconds after turning on the power. 4-step temperature adjustment is possible. Peltier device is removable. You can wash the wear only after removing it.