Free PDF tutorial(more than 22 lessons) and clear listing in a nice packageThe most economical kit based for platform to starting programming for those beginners who are interested.Lcd1602 module with pin header (not need to be soldered by yourself)This is the upgraded starter kits with power supply module, 9V battery with dc. High quality kit with for R3.100% compatible with for R3, MEGA 2560 R3, NANO.Colour:As shownMaterial:ABSPackage Contents:10 x white LEDs10 x yellow LEDs10 x blue LEDs10 x green LEDs10 x red LEDs2 x RGB LED4 x photoresistors2 x thermistor4 x diode rectifiers (1N4007)4 x NPN transistors (PN2222)2 x tilt switch10 x buttons (small)2 x 1-digit 7-segment display2 x 4-digit 7-segment display2 x sound sensor module2 x LCD1602 module (with pin header)2 x IC L293D2 x IC 74HC5952 x active buzzer2 x passive buzzer2 x DHT11 temperature and humidity module2 x potentiometer2 x joystick module2 x membrane switch module2 x 5V relay2 x infrared receiver module2 x for R3 controller board2 x 830-point breadboard2 x Motor(SG90)2 x stepper motor2 x ULN2003 stepper motor driver board2 x prototype extension2 x power module2 x ultrasonic sensor2 x 3V Motor(Wire Bonding)2 x fan blade2 x remote2 x 65 jumper2 x water level sensor2 x USB cable2 x 9V battery with DC20 x resistors (10R)20 x resistors (100R)20 x resistors (220R)20 x resistor (330R)20 x resistors (1K)20 x Resistor (2K)20 x Resistor (5K1)20 x resistors (10K)20 x Resistor (100K)20 x resistor (1M)20 x female to male wire2 x CD with TotutialOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.