LeonardoR3 Development Board ATMEGA32U4

Model: YZQ-B013
Features:
The ATmega32u4 has USB communications built in, eliminating the need for a second processor. It appears to connect a computer mouse and keyboard, in addition to a virtual (CDC) serial/COM port.
DC current/I/O pin: 40 mA
DC current for 3.3V pin: 50 mA
Flash memory: 32 KB (ATmega32u4) 4 KB used by bootloader
SRAM: 2.5 KB (ATmega32u4)
EEPROM: 1 KB (ATmega32u4)
Clock speed: 16 MHz
Length: 68.6 mm
Width: 53.3 mm
Weight: about 20 g