Digispark Rev3 Attiny85 board compatible with Arduino via USB

Compatibility: Compatible with Arduino via USB, supports Arduino IDE 1.0+ (OSX/Win/Linux) Power: Power via USB or external source, external source: 5V or 7-35 volts (auto select), 5V regulator with 500mA capacity Built-in features: USB interface (including disinfection string) Input/output pins: 6 I/O pins (2 used for USB connection; the remaining 6 available for general use, even during programming via USB) Memory: 8K flash memory (6K available after loading the bootloader) Interfaces: I2C and SPI (replaces USI), three PWM pins (software controlled), four ADC pins Indicators: Power LED, test/status LED (on Pin0)