A cool vest made of mesh material capable of cooling to -23°C with four Peltier units. - Model Name: PV555 (Size M) - Cooling Temperature: -23°C - Heating Temperature: 50°C - Battery Capacity: 14000mAh - USB Type: Type-C - Fan: Quiet fan - Number of Peltier Units: 4 units - Material: Mesh material *This is an unopened item, but please understand that it has been stored and purchase accordingly.