Arduino Pro Mini 3.3V with headers

Maximum voltage: 3.3V
Clock Speed: 8Mhz
Input voltage: 3.3 to 12V
EEPROM: 512Bytes
SRAM: 1KB
14 Digital input/output pins of which 6 can be used as PWM
8 analog inputs A0 to A7
Maximum current per I/0 pin = 40mA
Reset function by means of a tips key
8KB Flash memory of which 0.2KB is used by the bootloader
Overvoltage protection
The Pro Mini comes with a set of header pins so that you can determine the configuration yourself.