Features: The WIFI module enables wireless file management across devices via ESPwebDev, featuring two voltages compatibility (3.3V/5V) and card shaped design for direct slot insertion without extra cabling. Equipped with onboard card reader and CH340E USB serials chip, this module supports seamless WiFi configuration through serials commands and includes toggle switches for switching between USB modes. for developers and printing enthusiasts needing multi device access to shared storage, it simplifies remote file operations like copy/pastes/delete through WebDAV clients. Perfect for managing print files wirelessly in workshops, this module acts as a cloud like storage hub accessible via routers while maintaining existing networking connection. Its integrated 600mA ensures stable power delivery during WiFi operations, and open source GitHubs documentation allows customization for advanced IoTs applications. Specifications: Materials: ABS Size: 49.5x24mm Working voltages 3.3V (via pointers)/5V (via USB) current: 600mA Package Includes: 1PC WIFI Module note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.