南非采购需求：黑白超声波、彩色多普勒超声波、心电图、数字X光、病人监护仪

I'm interested in exploring options for handheld devices, particularly those that are versatile and user-friendly. I'm looking for products that can cater to various applications, whether for general purpose use or specific tasks. Please provide details on the available models, including specifications, features, and any unique selling points that set them apart in the market. Additionally, it would be great to know about the pricing structure, minimum order quantities, and lead times for delivery. If there are any bulk purchase discounts or promotional offers, please include that information as well. I'm eager to learn more about your offerings and see how we can move forward with a potential partnership.