This student duffel bag features a semiconductor cooler that converts air into cold air through semiconductor chip refrigeration technology for a cooling effect.
The cold air is discharged from the school bag mesh cooling holes close to the back, so your back will not be hot anymore

Instructions for use
The semiconductor cooler is fixed in the mesh pocket on the side of the schoolbag, and the usb cable is connected to the mobile power supply inside the schoolbag through the usb hole, so as to provide power for the cooler.
When you need to use the cooling function of the school bag, you just need to follow the following simple steps;
1, Make sure the usb cable of your cooler is connected to the mobile power supply. (This product will be shipped with a free mobile power supply sent with the book bag)
2, gently press the ON/OFF power switch once, it only takes a few seconds, the cooler starts to cool and work, when you need to turn off the cooler, please press the ON/OFF power switch once again

Note: You can not put the cooler or mobile power in the water to clean, to avoid failure!