Description: 100% new and high quality Material: plastic, metal Color: see picture Size: Box length 19 cm/7.48 in, width 9 cm/3.5 in Package includes: 1 set of electronic components with box 1 x Power supply (Warning: Do not use voltage higher than 9V) 1 x 830-hole breadboard 1 x 65 pcs jumper wire 1 x 140 pcs solderless jumper wire 1 x 20-pin female-to-male Dupont wire 2 x header (40 pin) 1 x precision potentiometer 2 x photoresistors 1x thermistor 5 x diode rectifiers (1N4007) 5 x NPN transistors (PN2222) 1 x IC 4N35 1 x IC 74HC595 1 x active buzzer 1 x passive buzzer 10 x switches (small) 10 x 22 pf ceramic capacitors 10 x 104 ceramic capacitors 5 x electrolytic capacitors 5 x electrolytic capacitors 10 x white LEDs 10 x yellow LEDs 10 x blue LEDs 10 x green LEDs 10 x red LEDs 1 x RGB LED 10 x resistors (10R) 10 x resistors (100R) 10 x resistors (220R) 10 x resistors (330R) 10 x resistors (1K) 10 x resistors (2K) 10 x resistors (5K1) 10 x resistors (10K) 10 x resistors (100K) 10 x resistors (1M) Note: 1. Please allow 5-10 mm differences due to manual measurement. 2. The actual color of the product may differ slightly from the picture and the website due to various factors, such as screen brightness and light brightness.