Normally one person can operate 3-5machines, if after learning. Because after adjusting, the machine can work well, but sometimes you need to check if the LED feed well, check the tin wireless, or more. And if the wire is tied before entering, the machine will stop working to protect the machine, then you need to start it again.
Vibrate feeds the LED bulb automatic
Testing for the positive and negative electrode
Testing the LED can light or not. If the LED can not work, it will be blow out