Power via USB or External Source - 5v or 7-35v (12v or less recommended,automatic selection) Support for Arduino IDE 1.0+ (OSX/Win/Linux) 26 I/O Pins (2 are used for USB only if your program actively communicates over USB, otherwise you can use all 6 even if you are programming via USB) MH-Tiny ATTINY88 micro development board 16Mhz /Digispark ATTINY85 Upgraded /for NANO V3.0 ATmega328 Extended Compatible for Arduino The MH-ET LIVE Tiny88(16.0Mhz) is shipped fully assembled except for the headersincluded and easy to solder them by yourself.