Key Features:Designed to bring all general purpose I/O pins to breadboard friendly pads on the outside edgesThis board DOES NOT feature the Ethernet optionCan be programmed using the Arduino IDE with Teensyduino add-onNXP iMXRT1062 chip, the fastest microcontroller available todayPins not includedTeensy 4.1 features the fastest micocontroller and an expanded set of powerful peripherals in a 2.4 by 0.7 inch form factor. It's designed to bring all general purpose I/O pins to breadboard friendly pads on the outside edges. Additionally, the bottom side of Teensy 4.1 has locations to solder 2 memory chips.Item SpecificsSize: 2.4" x 0.7"ARM Cortex-M7 processor at 600 MHzRecommended Accessories (not included): USB Cable, Pins 24x1 (2), 8MB PSRAM, USB Host CableNote: This board cannot be used with ethernet capabilities. Due to microchip shortages, the ethernet chip has been removed from this board.