Product: Qunqi Leonardo R3 Development Board Microcontroller ATmega32u4 for arduino + USB Cable
Brand: Qunqi
Description: 
 1. Controller: ATmega32u4 
 2. goods recorded: 16 MHz 
 3. Operating voltage: 5V 
 4. Input Voltage (recommended) :7-12V 
 5. Digital IO port: 22 (D0-D13, D14-MISO D15-SCK, D16-MOSI D18-23 [A0-A5) 
 6. PWM channel: 7 (D3, D5, D6, D9, D10, D11, D13) 
 7. analog input: 12 (A0-A5, D4-A6, D6-A7, D8-A8 ,-A9 D9, D10-A10, D12-A11) 
 8. 5V digital / analog port maximum permissible current: 40 mA 
 9. 3.3V digital / analog port maximum permissible current: 50 mA 
 10. Flash Memory: 32 KB (ATmega32u4) of which 4 KB used by the bootloader 
 11. SRAM: 2.5 KB (ATmega32u4) 
 12. EEPROM: 1 KB (ATmega32u4 

leonardo R3 Input Voltage: 7-12V,Operating Voltage:5V,SRAM:2.5 KB (ATmega32u4)
leonardo R3 Flash Memory: 32 KB (ATmega32u4) of which 4 KB used by the bootloader
leonardo R3 PWM channel: 7 (D3, D5, D6, D9, D10, D11, D13)
leonardo R3 Analog Input Channels:12(A0-A5, D4-A6, D6-A7, D8-A8 ,-A9 D9, D10-A10, D12-A11)
leonardo R3 Digital IO port: 22 (D0-D13, D14-MISO D15-SCK, D16-MOSI D18-23 [A0-A5)

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