Single 140mm version of Lian Li's SL-Infinity fan. Same magnetic daisy-chain design and infinity-mirror RGB effect, in the larger 140mm form factor that suits 280mm/420mm radiators or top-mount exhaust on the right cases.
PWM controlled, 250-1600 RPM, fluid dynamic bearing for low noise at higher speeds. Add to an existing SL-Infinity chain (this is what makes them "wireless") so you get one cable run from the whole fan stack to the controller. We use these to round out 280mm/420mm AIO installs in O11D EVO chassis and similar showcase cases.