Our offline control board is compatible only with our specific control systems. To ensure compatibility with your product, please confirm with customer service before placing an order. Enjoy your shopping! The PWM pulse frequency duty cycle 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 (refers to 100% PWM duty cycle speed). Y+ unlocks the device. Y returns to zero. Z+ toggles between Chinese and English display. Supports four-axis control: XYZA. Compatible file types: 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: writes G-code files into 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: Other items shown in images are not included. Lighting and display differences may cause slight variations in color between the product image and the actual item. Measurement error is +/- 1-3 cm.