1.8 Inch Offline: 1.GRBL control /Z three axis 2. Control interface return: set as origin 3. Offline main page, Y+ unlock 4. Offline main page, Y-return to zero Offline main page, Z+Chinese and English switching PWM pulse frequency duty cycle is adjustable, short press the main page Z+, Z- laser power/spindle speed Short press the EXIT, the maximum spindle speed is 1000/10000 switch (the speed when PWM is set to100% duty cycle) Support files: NC, NCC, TAP, , Gcode, GCO, NL, CUT, CNC Built-in battery time adjustment Support SD/TF memory card Material: plastic + metal Color as shown Package Contents: 1 x Offline Controller Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.