The Teensy 4.1 is the newest iteration of the astoundingly popular development platform that features an -M7 processor at 600MHz, with a iMXRT1062 chip, four times larger flash memory than the 4.0, and two locations to optionally add more memory. The Teensy 4.1 is the same size and shape as the Teensy 3.6 (2.4inch by 0.7inch), and provides greater I/O capability, including an ethernet PHY, SD card socket, and USB host port. Teensy 4.1 32-bit microcontroller board -M7 600MHz Have fun with for quick start programming If you are not professional for technology, please don't buy this product Installation guide not included, Please check as much as possible to make sure the item is what you need. Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Color: As Shown Material: PCB Package Contents: 1 x TEENSY4.1module development board(Not welded) 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.