Features: The E4 board is a minimal 3D Printers control board on the ESP32 microcontroller Support WiFi awirelessly. up to 240MHz, 16M meory Achieve powerful control over your 3D printers,E4 ESP32 Control Board support WiFi Wirelessly capabilities. Highly speed USB connection Highly temperatures FR4-TG130 board A controllable fan, you can choose power voltages (12/24V) 5V for it Specifications: Item: E4 ESP32 Control Board Size: about 90mmx67mm/3.54x2.64in Support WiFi Wirelessly Input: 12V to 24V Output:3 power outputs and 3 5V outputs with: 4xTMC2209 Step drive Xh2.54 Connection Package Includes: 1Set E4 ESP32 Control Board note: Due to light and screen difference, the item color may be slightly different from the pictures. Please allow 0.5-2cm differences- due to manual measurement.