Number of revolutions
The speed of rotation of the motor of the remover, expressed in revolutions per minute. The speed of movement of the blades directly depends on this parameter, and on it, in turn, the quality of lint removal: the faster the blades move, the more efficiently the lumps are cut.
USB charging
The ability to charge the battery of the device
from the USB port. This function can be useful when traveling: if necessary, the battery of the device can be recharged from the Power bank or the USB port of the computer. The connector in the device itself comes in several varieties, in particular, microUSB and USB C.
Charging time
The time required to fully charge the battery (from zero to 100%) in properly powered lint removers (see above). This information allows you to estimate how long pauses in work will be required to charge the battery. (Although some models, supplemented by mains power, are able to work while charging).