Description Heated Car Blanket USB 5V 2A Electric Blanket 35-50℃ Suitable for Travel Heating Cover Camping Portable Machine Washable Electric Mattress Size 160x80x0.5cm/62.99*31.5*0.19inch 160x150x0.5cm/62.99*59.06*62.99 USB electric blankets are not suitable for use in cold environments. If you do not use the specified adapter (USB 5V2A required) as required, its working efficiency will be seriously affected, and you may not even feel the heat of the electric blanket. The heating effect of the USB electric blanket is very general. This product uses a USB 5V 2A low-voltage power supply. The power is only 5-10w. Due to the power limitation of the USB interface, its heating temperature and warmth retention performance are worse than those of electric blankets with car voltage (12V, 24V) and household voltage (110V, 220V). The higher the working voltage, the stronger the warmth retention. AC110V/220V＞DC12V/24V＞Usb5V Please consider carefully before purchasing, thank you!