Features: 1. Easy To Use 2. Contains A Lot Of Sensors 3. Variable Development Board 4. Packed In A Plastic Box For Easy Storage, It Is Easy To Organize And Store Your Components, Making Your Work Space Neat And Orderly. 5. Easy To Carry Description: Set: A Style: 830-Hole Breadboard (Excluding for Uno R3 Motherboard) Type: Suitable For Uno R3 Development Board Material: Plastic+PCB+Metal colour: As shown Product accessories may vary in appearance, color, and printed text between different batches, but this will not affect their use. Package Contents: 3 x 830 breadboard 3 x USB cable 3 x LM35DZ sensor 6 x 5528 photoresistors 3 x water level sensor module 3 x 1 digit display tube 3 x sound module 3 x RGB 3-color module 3 x DHT11 temperature and humidity sensor module 3 x infrared obstacle avoidance module 3 x potentiometer 30 x Dupont wire 3 x passive buzzer 3 x active buzzer 18 x tact switches 18 x tactile switch caps 30 x 1K resistor 1/4 30 x 10K resistors 1/4 30 x 220R resistor 1/4 30 x 4K7 resistor 1/4P 3 x 2.54MM pin header 40P 15 x red LED 15 x yellow LED 15 x green LED