尼日利亚采购需求：数字标牌、交互式白板、工业平板电脑、自助服务终端、OLED屏幕

I'm interested in sourcing digital boards and interactive smart boards specifically designed for classroom environments. Could you provide detailed specifications, features, and pricing for various models you offer? Additionally, it would be great to know about your warranty policies, available support, and lead times for delivery. If you have any promotional offers or bulk purchase discounts, please include that info as well. Looking forward to your response!