Well lets see, the F1 came as a bundle with everything they currently had for the F1.  Extender-Slider, RA2, air purifier and the xTool F1 has no markings on the bottom of the base that has no lines to set the slide extension.

Model: MXF-K001-LG4

FCC ID: 2AH9Q-MXFK001

Wavelength: 455+5 nm (10 W)/1064+1 nm (2 W)

Input power: 24 V = 5 A, 120

received it early November of 2023.

This just feels bad as I have been complaining about this for almost 3 weeks and the machine when scoring not being equality output as I can burn 4 items same wood, same settings and they are not consistent.  I have cleaned the lens, disconnected (turn off/on removed powercables) and its just horrible to work with this.