千斤頂，速度讀數

I was a bit skeptical about adding a speed readout to my old machining setup, but this jack was dead simple to install and sync with the machine. The readout feels solid and stays accurate even after hours of use. Now I can dial in my cuts with way more confidence.

The display is clear enough to read from across the bench, though the mounting bracket could be a bit sturdier. It's been accurate and reliable since I installed it on my lathe.

Had a slight hiccup getting the connector to seat properly the first time, but once it clicked in the readout is dead-on accurate compared to my handheld tachometer. Makes dialing in speeds for different materials much easier.