Clone of the Arduino Pro Mini fitted with an ATMega168 microcontroller operating at 5V 16MHz. 100% compatible.
The Pro Mini was designed as a low cost microcontroller board which can be left embedded in your design.
There is no USB interface so programming is via a stand alone programmer, such as the USBasp, a Uno board or USB-TTL adaptor.
Supplied with straight and right angled header pins for soldering to the board if required.
Wiring the Pro Mini to a USBasp is shown here.