Our offline control board is compatible only with our specific controller system. To ensure compatibility with your product, please confirm with customer service before placing an order. The duty cycle of the PWM pulse frequency is adjustable. Short press Z+ or Z- on the main page to adjust laser power or spindle speed. Short press EXIT to switch maximum spindle speed between 1000 and 10000 (corresponds to 100% PWM duty cycle). Y+ unlocks the device. Y returns to zero. Z+ switches between Chinese and English interface. Supports four-axis control: XYZA. Compatible file formats: NC, NCC, TAP, Gcode, GCO, NL, CUT, CNC. File navigation: Short press X+ or X- on the file page to turn pages. Built-in battery for time adjustment. Includes free 128MB memory card. Supports TF memory card. Press and hold Z+ for 5 seconds to change the language to English. Press SMOD to return. Card reader function: write G-code files directly to the root directory of the card. Material: ABS Color: Black Package Contents: 1 x 1.8 inch offline control board 1 x TF card 1 x cable Note: Light and display differences may cause slight variations in color between the image and the actual item. Measurement error allowance is +/- 1-3 cm.