Yes, those information are obviously available. The easiest way to find them is to look directly on the product page (http://www.tobii.com/en/eye-tracking-research/global/products/) directly, e.g. Tobii X2: http://www.tobii.com/en/eye-tracking-research/global/products/hardware/tobii-x2-30-eye-tracker/
then open the Technical Specifications Tab.
However, for the X2-30, here’s the direct link: http://www.tobii.com/Global/Analysis/Training/Metrics/Tobii%20X2-30%20Eye%20Tracker%20Accuracy%20and%20Precision%20Test%20Report.pdf