Here are the key features and components you might find on such a board:

ATtiny88 Microcontroller: The ATtiny88 is a member of the ATtiny series of microcontrollers by Atmel. It is a low-power, 8-bit microcontroller based on the AVR architecture. It typically runs at 8 MHz and has flash memory for program storage, SRAM for data storage, and various I/O pins.

Micro USB Connector: This development board is equipped with a Micro USB connector. The Micro USB port is commonly used for powering the board and establishing a connection with a computer for programming and debugging. The USB interface may include a USB-to-Serial converter if necessary.

Power Supply: The board may support a wide range of power supply options, including USB power through the Micro USB connector, external power through headers, or battery power, depending on the design.

GPIO Pins: The ATtiny88 has a set of GPIO (General Purpose Input/Output) pins, which allow you to connect sensors, LEDs, displays, and other peripherals to the microcontroller. These pins are typically broken out on the development board for easy access and prototyping.