#1	ATtiny85 onboard 8K of flash 512 byte of SRAM 512 bytes of EEPROM Internal oscillator runs at 8MHz but can be doubled in software for 16MHz
#2	USB bootloader with a nice LED indicator looks just like a USBtinyISP so you can program it with AVRdude with a simple config modification andor the Arduino IDE with a few simple config modifications
#3	MicroUSB jack for power andor USB uploading you can put it in a box or tape it up and use any USB cable for when you want to reprogram
#4	525K bytes available for use 275K taken for the bootloader
#5	Onboard 50V power regulator with 150mA output capability and ultralow dropout Up to 16V input reversepolarity protection thermal and currentlimit protection