Currently Advantech offers four different SKUs of the AIW-166K series of kits. On this slide it shows all the specifications of the AIW-166K kits and as shown, most of the specifications are the same across all four with exception to vPro support and operating temperatures. Those key differentiating factors can be seen in red here. The AIW-166K SKUs ending in odd numbers, the AIW-166K1 and AIW-166K3, do not support vPro; while the SKUs ending in even numbers, AIW-166K2 and AIW-166K4, do. The SKU kits ending with K1 and K2 supporting normal operating temperatures compared to the SKU kits ending in K3 and K4 that support a wider operating temperatures for applications that call for it.