For university teachers, most of the lectures will now use ppt. A laser pointer called a hand can liberate your activity space and allow you to relax more. Before you use a Hanwang laser pointer, it feels very general. Crowdfunding saw this project. It was very eye-opening and the price was not high.
Let me talk about the characteristics of it, very small, put it in the school bag and a pen is almost the same size, and U disk and bus card than the size.
Of course, this is also a pseudo-open box. The laser pointer has been used for several months. Overall, it is still very satisfactory. (Nearly too lazy to take a SLR, basically all the phone photos.)
First packaging
There is some simple information above, and the back is the operation guide.
The box is also very simple
There are only three things inside, the laser pointer body, the charging cable, and an instruction sheet (the warranty service information on the back). The manual is very small and the content is very full. It also hints that the metal will affect the signal transmission. The previous Hanwang laser pointer was always affected. This influence is not timely when the time comes.
positive
There is only one button, which is the biggest feature. Press down to page down and press twice to page up. Always press the light to turn on the laser pointer. Spot focus is also good, this is a spot on the wall 2.4 meters away. The effect in the large-scale classroom is also very good, but taking pictures while class is too weird, there is no picture...
back
There is also a small label on the back labeled with a simple user guide
There is a positive Joylnk under the back
side
There is nothing on the side
One side is equipped with charging indicator and charging port (Micro USB) in the middle and upper part. 
A blue light will be on when charging (but it took two months and I didn't charge it. It was just plugged in for the photo).
The top is red and there is a yellow laser warning sign.
The bottom is the receiver's storage compartment, which is a very reasonable part of the design, one receiver is received on the laser pen body, easy to carry; Second, this storage bin is also a laser pen switch, plug in the receiver laser pen is in When it is off, the laser pointer is turned on and the laser pointer has no other switch.
The receiver is very small, it's very space-saving when plugged into the u port, it is very convenient on the personal computer, but the public computer in the classroom podium may be very tragedy (suddenly remembered those U disk away from me ...)
One side has raised stripes and one side is smooth. This not only ensures that the receiver is easily removed from the laser pointer, but also that the receiver is well integrated into the unit.
Finally, summarize the advantages and disadvantages.
First, the advantages
1, the shape of the design is simple, compact, easy to carry;
2, low power consumption, not charged after arrival, spent two months, a total of about 50 hours, but also can be used normally, charging is very convenient, micro-usb power cord is very common, the manual says can not exceed 3 Hours;
3, only one button division of labor is clear, there will be no button can be found or by mistake;
4, the signal receiving effect is good, plugged in the chassis of the u mouth, close control of the metal cabinet is not much affected;
5, cheap, crowdfunding stage 40 yuan shipping (I wonder if the official version will be how much pricing);
6, although the specification is small, but the content is very comprehensive.
Second, disadvantages:
1, there is only one button, three kinds of pressing corresponding to three kinds of operation, need a certain learning adaptation time.
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