Elego Inc. is a professional manufacturer and exporter that is concerned with the design, development production and marketing of arduino, 3d printers, raspberry pi and STM32.Our Dream is to make the best price and best quality produce for customers.So we would like to receive your valuable suggestions for our products and we can improve them for you.Component listing:1pcs UNO R3 Controller Board1pcs LCD1602 Module ( with pin header)1pcs Breadboard Expansion Board1pcs Power Supply Module1pcs Joystick Module1pcs IR Receiver1pcs Servo Motor (SG90)1pcs Stepper Motor1pcs ULN2003 Stepper Motor Driver Board1pcs Ultrasonic Sensor1pcs DHT11 Temperature and Humidity Module1pcs 9V Battery with DC1pcs 65 Jumper Wire1pcs USB Cable1pcs Active Buzzer1pcs Passive Buzzer2pcs Potentiometer1pcs 5V Relay1pcs Breadboard1pcs Remote1pcs Tilt Switch5pcs Button (small)1pcs 1 digit 7-segment Display1pcs 4 digit 7-segment Display5pcs Yellow LED5pcs Blue LED5pcs Green LED5pcs Red LED1pcs RGB LED2pcs Photoresistor1pcs Thermistor2pcs Diode Rectifier (1N4007)2pcs NPN Transistor (PN2222)1pcs IC 74HC59530pcs Resistor10pcs Female-to-male Dupont Wire