After sales service:1. The whole machine has a one-year warranty, and the laser has a two-year warranty The supplier is responsible for replacing damaged accessories through express delivery, and provides on-site technical support for major issues;2. Fragile products such as optical fibers, welding head lenses, etc. are not covered by the one-year warranty. If there are major problems, they can be resolved through negotiation;3. Consumables such as protective lenses are not covered by the one-year warranty;4. Lifetime provision of free telephone service