The common infrared remote control system in portable green laser pointer generally includes receivers and emitters

Laser improper use may cause personal injury, so please carefully before use to understand the knowledge of the safe use of laser.
The common infrared remote control system in portable  green laser pointer  generally includes receivers and emitters.  The middle through the air refraction, reflection, filter, barrier, actually reach human power has been reduced a lot. I say and do not mean low-power laser will not cause harm to humans, I just do not have to be very bold to think that laser is a dangerous thing. 6mW laser (only on behalf of low-power), If you think the laser is dangerous because if the U.S. Food and Drug Administration said a P It is large and is not necessary, because they are wrong, they are just in the laboratory. Is not applied to the actual and the use of laser attention to all aspects of safety factors can be Can be said is zero danger.
Around the diffraction to a very far, is the truth. Reason could you buy a green pen affixed the label of false power, you give one up.   3rd floor Laser pointer to buy.  Buy a laser pointer, if you want to buy a genuine The best that they can have a power meter.  Since the laser beam can't penetrate walls, portable  green laser pointer  won’t interrupt the signal of other electrical equipments.  If not, In general there are several ways to detect (for green, my favorite, yellow, and I love, afford)  A. In general, green is not as we think, Light, the brighter the higher the power, in fact, many cases, the eyes to identify, Different laser power, in fact, almost bright, but, Power laser (5mw) point focus (process issues).
The price is very low, because the use of poor crystal quality, cost. Crystal quality of the specific need to know I point to some specific intrinsic I do not quite understand.  The crystalline general points: Gluing crystals Separation of crystals There is a bond crystal or something. Or other classification.  3: Crystal Life Good crystal quality of life is certainly longer. There is a situation, we are talking about overclocking. Meaning seems to be using technology to make more power, However, the crystal life will reduce the use will not last long. Provided the given circuit is correctly connected, portable  green laser pointer  can be in use without debugging.
Use the experience  I think where wrote Where are the voice of experience. If we need to supplement, but also to talk about.  (1) battery: Most of the laser battery positive and negative electrodes placed very special direction, cathode tail installed. And other electrical use positive toward the habit contrary. Do not day habitually made a mistake. . A small part of the laser battery is positive towards the installation of. Specific use to see the instructions for use of each laser Do not blindly install the battery for the first time.  The traversing capacity of infrared technology applied in portable   green laser pointer is comparatively weak.