Parameter Input voltage/frequency: 220V/50HZ (110V/60Hz) Welding voltage: 40V Input power: 100W Welding current: -50A-150A Insurance tube: 250V/2.0A Welding time: 3ms-30ms Protection level: IP21 Air supply pressure:≥0.1MPa Maximum welding flat rate: 1HZ Maximum argon consumption: 5L/min Introduction This product is a pulsed argon arc welding machine. The equipment cost and operating cost can be used for welding pure gold, welding of cobalt-chromium alloy, welding of pure gold and cobalt-chromium alloy, welding of pure titanium, and orthodontics. In order to avoid electric shock, fire and dangerous accident when using electrical equipment, be sure to pay attention to following basic safety measures. Before using the instrument, please read this manual and precautions. Placing this manual near the instrument for convenient view.   The operating of the equipment should maintain good ventilation and lighting, do not work in a humid and dusty environment thus to avoid accidents by abnormal environment. Never let any liquid enter the instrument. There will be a strong arc light when operating, irrelevant personnel should away from the work site for avoiding damage the eyes.     This machine with compact and reasonable structure does not need special and tedious maintenance. Paying attention to the cleaning of the instrument, especially the microscope. Not clean the attachments will seriously affect the observation of objects. 9.The instrument should be covered with a dust cover in non-working status. For your security, please use the correct fittings. Attention: The machine did not include the microscope, and you can also work without microscope.