Item Type: Development Board Starter Kit Microcontroller: For ATMEGA328P Working Voltage: 5V Input Voltage (recommended): 7-12V Input Voltage (limit): 6-20V Digital I/O Pins: 14 (6 of which provide PWM output) PWM Digital I/O Pins: 6 Analog Input Pins: 6 DC Current of Each I/O Pin: 20 mA DC Current of 3.3v Pin: 50 mA Flash Memory: 32 KB (for ATmega328P), 0.5 KB of which is used by the boot and interception program SRAM: 2 KB (for ATmega328P) EEPROM: 1 KB (for ATmega328P) Clock Speed: 16 MHz LED-BUILTIN: 13 1、Includes for ELEGOO R3 controller board and USB cable, 100% compatible with for IDE Official R3 official kit 2、Basic starter kit is suitable for beginners to learn programming, can assist in learning all the resources of the for R3 development board 3、This product is a very good choice, because the designer holds an open attitude and discloses all design schematics and procedures 4、DIY starter kit is suitable for school education and laboratory, very practical and helpful 5、Contains accessories such as breadboards, connecting wires, potentiometers, LEDs, resistors, etc., to facilitate learning and installation 1 x For R3 Development Board 1 x Breadboard 1 x Jump Wire 1 x USB Cable 1 x Battery Connection Line 1 x Pin Header 6 x Potentiometer 6 x Keycap 15 x LED 10 x Thin Film Resistor 220 10 x Thin Film Resistor 1k 10 x Thin Film Resistor 10k 10 x Thin Film Resistance 100k 3 x Photoresistor