CSL-Computer appears once on this site, in ergonomic mice, with its wired vertical mouse.
Wired, where the others are wireless. A USB 2.0 cable of 1.5 m (4.9 ft) means no batteries to change and no receiver to lose. The Anker, Logitech Lift and UGREEN in the hub are all wireless — the Logitech and UGREEN quote battery life, the Anker runs on two AAA cells.
Simple controls. Five buttons including forward and back, and a physical switch between 1000 and 1600 DPI — no software needed. That is a narrower range than the UGREEN’s four levels up to 4000 DPI.
What it leaves out. No size, no weight, no stated hand size and no warranty. A vertical mouse that is too large or too small for your hand is uncomfortable whatever its design; the Anker publishes its size and the Logitech Lift says which hands it suits — compare before buying.
Claims we do not repeat. The listing markets the mouse against “mouse arm” and tennis elbow. A vertical grip changes how the forearm is turned, which some people find more comfortable, but no mouse can be shown to prevent a medical condition. For persistent pain, see a doctor or physical therapist.
It had no US price when we checked.