Android Android is a kernel-based Linux operating system designed primarily for touch screen mobile devices such as smartphones or tablets, initially developed by Android, Google Inc. supported financially and later bought the company in 2005. IOS is a mobile operating system of Apple Inc. Originally developed for iPhone (iPhone OS), beingthen used in devices like the iPod Touch, iPad and Apple TV. Apple, Inc. does not allow the installation of third-party iOS hardware.

The use of LED bulbs has grown exponentially due to its great advantages. The LEDs are diodes that when passing the current emit light, these LEDs are controlled with a driver or power supply, providing a very stable power source and thanks to its dissipation system can achieve high performance and many hours of illumination .

• Duration of up to 50,000 hours, thanks to its dissipation system and voltControlled air.
• Fast on. The LED lights up much faster than a conventional light bulb.
• They do not emit almost heat, so they do not burn when touched.
• They contain no gas, no mercury, no pollutants.
• They consume 80% less than traditional light bulbs. Thanks to its continuous research, it is possible that this type of technology continues to evolve and reduce its consumption.
• LWhich emit, do not radiate ultraviolet or infrared rays.
• Low maintenance, since the LEDs do not melt, it only decreases its power. This dramatically lowers maintenance costs.
• Different shades, we can find different types of LEDs where we will find different shades of light, which can go from 2700K (yellow light) to 8000K (white light) without using filters.
• Sturdiness,If we compare with conventional light bulbs we find that LED technology withstands the vibrations much better. Ideal for what type of extreme installations.
• Emitting a direct light, the LED is characterized by being a directional light, so there is no loss of light.

L: Lumens
D: Duration in years
A: Saving
I: incandescent
H: Halogen
F: Fluorescent
D: Led Diode

There are several ways to connect electronic devices to each other; cables, infrared, etc. Bluetooth technology is one of them and enabling wireless transmission of voice and/or data between devices by radio frequency.
It is a technology of radio waves at short range (2.4 GHz) whose objective is the communication between devices such as computers, smartphones, tablets, printers, headsets and other dispositives hand.
Bluetooth is called the communication protocol specifically designed for low-power devices. These devices can be classified according to their transmission power:
- Class 1: 100 mW, maximum range approximately 100 meters.
- Class 2: 2.5 mW, approximate maximum range between 5 and 10 meters.
- Class 3: 1 mW, maximum range approximately 1 meter.

We can also classify this technology by standard. All these versions have backward compatibility, ie, it allows the latest standard is compatible with all previous versions.

- Version 1.2: 1 Mbit/s
- Version 2.0 + EDR: 3 Mbit/s
- Version 3.0 + HS: 24 Mbit/s
- Version 4.0: 24 Mbit/s