NOTE:Use a screwdriver couunterclockwise to remove the red fixed screws under the device, before you running the machine. The switch is a green one at the back of device. Turn on the switch, the display will be on, then the power is on. The number shown on the screen is mixing time. 2 Digital controller of both time and speed.It is in the front panel. Start the device once, it works once. If pause needed, just keep pressing the Start button for 3 seconds. If pause needed, press the button too. Safety lid and capsule clip: open the safety lid, fit the amalga capsule, glass ionomer. Or other material into the clip, while working, the safety lid must be closed. Feedback is very important to us. It is impossible to address issues if we do not know about them! Please keep the original box or packaging within 15days since item received. Your satisfaction is our ultimate goal. We work hard to earn your trust and future business. A If you receive a defective item, you may return it or ask for a discount. Due to time zones, our reply to your questions may not be immediately. If it's non-workdays, please kindly be patient and wait till Monday.