英国采购需求：黑白超声、彩色多普勒超声、心电图、数字X光、病人监护仪

I'm looking for portable ultrasound devices specifically designed for cattle health monitoring. It's crucial that these units are lightweight and easy to operate in various field conditions. Could you provide details on the available models, including their features and pricing? Additionally, I'd like to know about any warranty options and support services you offer. Thanks!