12V brushed geared motors typically have a continuous operating life of 1,000 hours. When the work is turned on, the thread behind the motor drive spits out and scattered on the ground, while the LED display above begins to count down the operating life (initial time of 3,600,000 seconds). Theoretically, when the countdown reaches 0, the thread will be entirely spit out, the motor will be completely lost, and the work will be declared dead.