ESP32 Control Board Support Bluetoothcompatible Touches Screen TMC2209 For Engraving Machine K92C Features: OOTDTY Featuring impressive ESP32 doublecore 32bit super at 240MHz. The motherboards is equipped with integrated, virtually quiet TMC2209 driver that operates at speed of 30,000mm. It supports offlined engraving and 3.5inch screen for easy operation. Enjoy smooth connection WiFiand Bluetoothcompatible. For enhances safety, it utilizes a multiplelink protections, head tilts detection, flame monitorings, and safety door function. Specifications: ItemESP32 Control Board Size:about 15x5cm/5.91x1.97in : ESP32 doublecore 32bit Frequency240MHz Driver: TMC2209 Package Includes: ESP32 Control Board Note: Due to the problem of lighting effect and there might be tolerances in product, please understand. Please allow 0-1cm error due to maunaled measurment. _x000D_ _x000D_ _x000D_