USB mini fridge: 1.Usb warmer/cooler. 2.Mini fridge, temperature decreases to 8.5 degree USB Mini Fridge1.Plug and play.2. ... be placed within a beverage4, built-in LED light5, USB Interface6, no battery5 minutes the temperature inside the refrigerator can ... degrees7, size: 19.4 × 9 × 9cm8, Weight: 362gPacking: 1, USB 2, mini refrigerator, for useProduct electrical parametersOperating Voltage: DC 5V ...