In order to make the IdeaCentre A540 display thinner, Lenovo moved some of the components in a base stand that also wirelessly charges QI-certified handhelds. The new all-in-one systems come in 24-inch or 27-inch sizes, and users can opt to get the 10-point touchscreen versions. Besides the gen 9 Intel i7 CPUs and AMD Radeon RX 560 GPUs, the 24-inch model may also be equipped with AMD Ryzen CPUs.
https://www.notebookcheck.net/Lenovo-announces-IdeaCentre-A540-asymmetric-all-in-one-PC-with-gen-9-Intel-CPUs-and-Radeon-GPUs.433524.0.html