A convex mirror is a piece of a sphere with reflective part on the outside (outer deformation out). They are also known as diverging mirrors, that is, light rays coming from a point, to be reflected, and not away intersect each other. For this reason the convex mirrors are not actual images. Convex mirrors for signaling can be installed both outdoors and indoors, Dependon the material. These mirrors are designed to see and be seen, particularly suitable for areas with low visibility to prevent accidents of pedestrian traffic, vehicle traffic and surveillance. can also be used for:
- Parking lots or parking
- Streets dangerous crossings
- Department Stores
- Shops and businesses
- Supermarkets
- Hospitals
- Factories and industries
- Piers
- Office buildings
- Schools
- Museums

Before deciding to mirror needs, you should always take into account the following parameters:

1. Distance between the observer and the mirror. That is, the distance at which the observer will be the mirror when viewing.
2. Number of addresses to be controlled.

We attach some approaches depending on the diameter of the convex mirror.

• diameter mirror 450mm -> 6 meters away from the mirror.
• 600mm diameter mirror -> 8 meters away from the mirror.
• 800mm diameter mirror -> 10 meters away from the mirror.
• 1000mm diameter mirror -> 14 meters away from the mirror.

Within the wide range of batteries on the market we can differentiate two large groups, disposable batteries and rechargeable batteries.
Disposable batteries are those that only allow a single use and when they are exhausted they can not be recharged. These batteries can store their energy for years.

Rechargeable batteries are those that can be recharged once exhausted. This type is losing charge when they are storedaccording to voltage. The most common we can find them of 1.2V and 3.7V

As a last point you have to take into account that lithium batteries, Lipo, Life etc. Due to its composition, specific loaders should be used.

Depending on the need for installation and type of base, trolley or chair, we can find various types of fixation. Among the most common we find:

A - Through hole: It has a hole in which a screw or stem is inserted. It is a very simple installation system. Ideal for wheels that should not support a lot of load.
B - Threaded stem: It has a threaded stem or nut, it is fixed to the surface with a nut. It is usually the most used fastening system.
C - Angular plate: They are usually less used fastening systems, they have lateral plates to fix on the base.
D - Plate: It has a rectangular or square plate on its surface, it includes 4 or more fastening holes to the base, it is one of the most common.
E - Smooth stem: The stem without thread is inserted into the female of the base, we can find it in the typical office chairs with wheels, TV furniture etc ...