1.Product anti-counterfeiting label:identify the authenticityscratcht he coating,and the label is invalid 2. Power heat dissipation design:hollow designuse heat-saving fan to accelerate teaching heat 3.Power supply parameter label:power supply modelbasic parameters compiled by input 4. Power output plug-in line: the output label is clear,plug the line interface directly 5.Power toggle switch: Two input voltages 110V/220V can be used 6. Fine-tuning the high and low voltageclockwise fine-tuning high and reverse rotation fine-tuninglowvoltage
