(1) We provide 24-hour technical services and guarantee to respond within 2 hours after a problem occurs (reported by the user in writing or by telephone).

(2) During the warranty period, we will provide free technical services.

(3) After the warranty period, we will provide zero-profit technical services and maintenance.

(4) Since the date of leaving the factory and within the warranty period, under the premise that the user uses it in accordance with the instructions, the laser tube has a power attenuation of less than 75% or the tube has no light in the tube, discharge in the tube, discoloration of the light in the tube, etc. , We are responsible for maintenance or free replacement (for details, please refer to the instructions for use of our relevant products).