1.1 Features and Overview Input Supply Range 1.8-5V Built-in Bluetooth® RN4678 Module ATSAMD21 Programmable Host Device Level Shifter between Host MCU and External Touch Devices to Enable Tuning on All Voltage Rails Communication Supports to PC for Visualization: USB Bluetooth Communication Ports to Target Device: UART SPI I2C GPIO Header to Connect Target Board Header Option to the Kit as MCP2221A Breakout Module LEDs for Comm’s Status