Arduino UNO R3 ATmega328P CH340G USB Driver Development Board, and it is an SMD.

• It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz quartz crystal, a USB connection, a power jack, an ICSP header and a reset button
• It contains everything needed to support the micro-controller; simply connect it to a computer with a USB cable or power it with an AC-to-DC adapter or battery to get started.
• Microcontroller: SMD (Surface Mount Chip)
• Microcontroller : Atmega328p. USB to UART converter : CH340G