Free warranty: The free warranty lasts for one year. Free service content: Provide necessary technical support services and free upgrade service of system hardware and software. Response time: Response within 0.5 hours, 1 hour + travel time to the scene to solve the fault. Spare parts: free of charge to meet two years of normal use of wearing parts and spare parts. Training service: Responsible for free training of operation and maintenance personnel, so that they can reach the level of independent operation, editing, simple maintenance, at the same time, our company provides permanent maintenance and technical consultation. Special service: regular telephone return visit, inspection.