Offline Controller Board is a 32-bit ESP32-based GRBL motherboard designed for DIY and professional laser engraving machines. It supports WiFi control and offline operation with a TS35 touch screen display, offering stable performance and user-friendly operation for precise engraving and cutting. 32-bit ESP32 Core: High-speed 32-bit main controller guarantees smoother motion control, faster processing, and improved engraving precision compared with traditional 8-bit boards. GRBL Firmware Support: Fully compatible with GRBL-based laser engraving systems, supporting common G-code commands for CNC and laser applications. Built-in WiFi Connectivity: ESP32 WiFi module enables wireless control and file transfer from PC, laptop, or mobile devices using supported control software or web interface. Offline Control Capability: Works without a dedicated computer when connected to the TS35 touch screen, allowing standalone operation and convenient workshop usage. Color: As Shown Material: PCB Package Contents: 1*Laser Engraving Machine Mainboard Kit 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.