How long is the watch bracelet? The ideal wearing length is a fingernail (except the thumb) that can be inserted between the wrist and the strap, preferably without feeling loose or tight.watch nato straps， The actual situation also needs to be considered in combination with the watch and the wearer:


Weight, thickness and dimensions of the watch
For watches with larger diameters and heavier weights, the wearing position should be slightly above the wrist to prevent the crown from slipping on the back of the hand, or the watch should be worn towards the palm of the hand. Like people who usually exercise a lot, the strap should be adjusted a little tighter.


To choose the appropriate strap length, the whole should be based on the material, shape and length of the strap. It should be able to control the position of the watch on the wrist, the watch cannot move up and down or side to side. If you remove the watch link, don't throw it away, you can always handle your fat day.


like：
What are the advantages of NATO straps
The origin of the name of the NATO strap
What are the advantages and disadvantages of nylon straps 

First of all, when you get a mobile phone, of course, it depends on the appearance. If the phone is in good condition, samsung second hand mobile , we won't lose a lot if we sell it.


Next, turn on the mobile phone and test the basic functions: signal, wifi, earpiece, speaker, speaker, front and rear cameras, fingerprint, photosensitive, face recognition, and test whether the face recognition is normal.


Again, use the test program that comes with the Samsung mobile phone, open the phone, enter *#0*# in the dial interface to enter the test program, the first three items are the red, green and blue color tests to see if the screen is aging, mainly to see if the colors are consistent, other We have tested some items, the most important one is the touch screen test. Fill all grids and pass the test.


The last point, although it has nothing to do with the function of the mobile phone, but we also need to pay attention, because we bought a second-hand mobile phone, we must ensure that the machine is not stolen, otherwise it may be lost whether it is a mobile phone or RMB! !


like:
Where did the old cell phone come from? Mainly these 3 sources! 
What is the difference between used and refurbished mobile phones? 
What should you pay attention to when buying a used mobile phone? 

1. It is related to the sensitivity of the microphone. It may be that the sensitivity is too high, but in fact, sometimes high sensitivity is required. In this case, headphone manufacturer，you should try to reduce noise when recording.


2. It is more likely that the electromagnetic interference of the microphone is too great. Because condenser microphones have almost no internal resistance, their connections are very susceptible to electromagnetic interference, so generally condenser microphones use shielded connections to reduce interference.


This can be distinguished by completely blocking the microphone head, such as pressing it against a rubber pad. If the noise is still relatively high, it should be mainly electromagnetic interference, so it should be replaced with a better shielded connection.


Connect a suitable resistor in parallel with the microphone (according to the specific situation of the microphone, you can try to use a 10k or larger potentiometer, or simply build a 100k potentiometer yourself and manually adjust the resistance to the appropriate resistance), the parallel resistance will reduced to a certain extent. High sensitivity, while filtering out some electromagnetic interference.

like：
How to choose a karaoke microphone 
How to connect a microphone and a smart speaker 
Difference Between Wireless and Bluetooth Microphones 


ick here to edit.

Bioelectric therapy can be said to be a biological basis of traditional Chinese medicine. It creatively combines ancient traditional Chinese medicine with modern western medicine reflexology and bioelectrical technology, physiotherapy machine and uses bioelectrical therapy equipment to output electrical energy.


It can instantly open up the damaged and atrophied meridians of the human body, make the blood of the human body smooth, enhance the immune function of the body, and achieve the purpose of preventing and treating diseases. Whether this method can cause harm to the body needs to be judged according to a series of conditions during the treatment process. Under normal circumstances, the treatment method will not be harmful to the body.


General physiotherapy electrotherapy will not do any harm to the body. At most, it will have a little radiation to the body, just like watching TV, there will be radiation. On the whole, physiotherapy electrotherapy can treat diseases, and it will not cause much harm. The blocked blood vessels are opened up, so as to achieve the effect of curing diseases. However, because everyone's physical condition is different, the performance after physical therapy may also be different. Therefore, more attention must be paid to the understanding of this situation.


like：
Can electrotherapy be done every day? 
Is Electrotherapy Harmful to Human Body?
The role of electrotherapy and magnetic therapy