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 / B Style: 400-Hole Breadboard Set (Excluding for Uno Motherboard)/(With for Uno Motherboard) Type: Suitable For Uno R3 Development Board Material: Plastic+PCB+Metal colour: As shown Package Contents: 5 x Yellow Led 5 x Green Led 5 x Red Led 1 x Rgb Led 1 x Thermistor 1 x Tilt Switch 2 x Photoresistor 10 x Dupont Cable Male To Male 30 x Unit 3 Kind Of Resistor 6 x Button Switches 1 x Potentiometer (10k) 1 x Active Buzzer 1 x Passive Buzzer 1 x Dht11 1 x 1-Digit 7-Segment Display 1 x Water Level Detection Sensor Module 1 x Sound Sensor Module 1 x Soil Moisture Sensor 1 x Obstacle Avoidance Module 1 x Usb Data Cable 1 x Plate / 5 x Yellow Led 5 x Green Led 5 x Red Led 1 x Rgb Led 1 x Thermistor 1 x Tilt Switch 2 x Photoresistor 10 x Dupont Cable Male To Male 30 x Unit 3 Kind Of Resistor 6 x Button Switches 1 x Potentiometer (10k) 1 x Active Buzzer 1 x Passive Buzzer 1 x Dht11 1 x 1-Digit 7-Segment Display 1 x Water Level Detection Sensor Module 1 x Sound Sensor Module 1 x Soil Moisture Sensor 1 x Obstacle Avoidance Module 1 x Usb Data Cable 1 x Plate 1 x for Uno Motherboard Only the above package content, other products are not included. Note: Light reflection 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.