10x Electrolytic Capacitor 470uF 16V 105ºC

10x Push button 6x6x9mm features:
-Touch Push Tact Switch mini electronic Arduino push button
-Measures: 6x6x9mm
-Quantity: 10 units

2 Double Side Prototype PCB Board 6x8cm features:
-Thickness of PCB: 1.6mm
-Material: high quality FR-4 glass fiber PCB
-Presented and numbered on both sides
-Top and bottom are identical copper layers
-Pads grid (pitch) 2.54mm/0.1", hole diameter 0.9mm

- Maximum current: 50 mA
- Tension DC: 24V
- Operating force: 1.27N
- Switch terminals: weldable
- Contact: SPST-NO
- Contact resistance: 100M Ohm
- Type of action: Superficial
- Measures: 12x12x7.3mm

High sensitivity to Ammonia (NH3), Nitrogen oxides (NOx), Alcohol, Sulphides, Benzene (C6H6), CO2, smoke and other harmful gases.  The MQ-135 sensor is to sensible for other gasses in the air so that is not possible to get good values for CO2 from it.
MQ-135 Air Quality Sensor features:
- Main chip: MQ-135 natural gas sensor and comparator LM393
- Working voltage: 5V
- Current: 150mA
- Digital output: TTL 0/1
- Analog output: analog voltage sensing value
- Quick response features:
- Detection concentration:
   10ppm - 300ppm NH3
   10ppm - 1000ppm Benzene
   10ppm - 300ppm Alcohol
- Adjustable sensitivity with the potentiometer
- Size: 32mm x 20mmx 18mm

10x Photoresistor 5mm GL5516 LDR 5-10k for Arduino.
Photoresistor is a resistor whose resistance decreases when increasing the intensity of the light that falls on it. 10x Photoresistor GL5516 LDR features:
- Model: GL5516
- Spectral peak: 540nm
- Maximum DC voltage: 150V
- Maximum power: 90mW.
- Resistance with light (10lux): 5-10KΩ
- Resistance with darkness (0lux): 0.5MΩ
- Response time: 20ms
- Operating temperature: -30ºC - 70ºC

2x Banana Connector Diameter 4mm Red and Black features:
- Length: 40 mm
- Diameter plug: 4mm
- Quantity: 2 units

Resistor 47R Ohm 5% 0,25W 1/4W features:
- 47R Ohm
-Type: Carbon film
-Tolerance: ±5%
-Power: 0.25W
-Dimensions: 2x7mm

Isopropyl alcohol is used for cleaning: - of electronic devices such as contact tips (such as those of ROM cartridges)
- tapes magnetic and disk heads (such as those for audio and video recorders and floppy drives)
- laser lenses on optical disc drives (eg CD, DVD) and removal of thermal paste of heat sinks and integrated circuit packages (for example: CPU)
-of the keyboard and LCD screen
-Usefully used to clean photographic lens lenses and contacts of electronic devices as it leaves no marks and is quick to evaporate.