After-sales service 1. Manual book. 2. Videos of installation, adjusting, setting, and maintenance, are available for you. 3. Online support, or face-to-face online communications, are available. 4. The engineer overseas services, are available. The tickets, visa, traffic, living, and eating, are for customers. 5. During the warranty year, without human-being broken, we will replace a new one for you. Iris Mobile:/whastapp:+44 7513625534 Threema:4MUUJRH2 Telegram:@iris32157