cell phone jammer can enhance the efficiency of education

how to measure the quality of the lens?  Thus, the first generation  cell phone jammer was gradually phased out.
Totally environmental factors (magnification greater the weapon sight of the light intensity, the less the smaller field of view, if the ambient light was not the case although the distance is still particularly high expansion of Weapon Sight then it is difficult to observe) and the degree of personal habits decision What is the exit pupil distance? Whether the optical laser pointer has a pupil distance? A: The most intuitive language; optical laser pointer systems, the existence of a light hole, only the naked eye into the light hole to see into the like,  On the basis of ordinary  cell phone jammer, multifunctional ones are developed.
What’s the most important is that  cell phone jammer improves the quality of teaching.  Generally all coated mirror eyepiece coating, generally eyepiece coating monolayer coating method will be able to distinguish between the essence of multi-coated and single coated, to avoid being deceived Q: optical laser pointer how to enlarge the target? A: The vast majority of the optical laser pointer using the Kepler telescope system by a convex lens, 2 just as the lens for the center of the lens differentiation board wire, two eyepiece's. It into a like for but rather just as the lens later.  cell phone jammer can enhance the efficiency of education. The easiest way is to pay attention to trademark and agent label, issued by the manufacturer or agency on behalf of its corporate logo trademark label, as well as two kinds of agent labels, trademark labels Needless to say, generally formal it must be. Agent label business sector provided : sales of goods to the goods vendor logo, business name! generally posted in a prominent position. If not so hard to say that must be authentic products may have two kinds: one is completely counterfeit products to imitate an appearance, intrinsic quality is unknown. For the naked eye at night to observe it, the green light than the red light softer, observed up green more comfortable, not fatigue.
"15 What is the weapon sight of nitrogen? Weapon Sight role of nitrogen in place? Determine whether nitrogen appearance? Nitrogen has specific data? A: Weapon Sight nitrogen this process is the charge in the weapon sight internal on the inert gas nitrogen, nitrogen-purged to prevent internal lens mold in order to better adapt to the harsh environment. nitrogen Qiangmiao the generally technically there are two kinds of nitrogen technology, is one: advance in laser pointer on the open hole, and then under vacuum to nitrogen, and finally sealed with screw nitrogen mouth,
With just a click on the relevant function button on a portable  cell phone jammer, you can display the electronic presentation . Observed up green more comfortable, not fatigue. 15 What is the Weapon Sight Chongdan? Weapon sight of nitrogen do? Determine whether nitrogen from the appearance? Charge of nitrogen specific data? A: Weapon Sight nitrogen process is in Qiangmiao internal charge on the inert gas nitrogen, nitrogen-purged to prevent internal lens mold in order to better adapt to the harsh environment.