In addition to waterproofing and shockproofing, sports require basic functions, as well as four major standards: electronic compass, air pressure prediction, altitude, and heart rate. Solar energy is of little significance, because the battery can be used for 2 years. Unreliable.
The altitude measurement function includes altitude range, altitude trend graph, altitude, relative altitude, maximum altitude, cumulative ascent, cumulative descent, etc., which are very important for mountaineers, not only can they know their altitude at any time, but also This judgment is whether to continue to climb upwards.

The electronic compass function is equipped with bearing tracking, bearing indication, north-south indicator, etc., so even in unfamiliar areas, you can find the right direction without worrying about getting lost.
The air pressure measurement function has air pressure range, air pressure trend graph, sea level air pressure, actual air pressure, etc. The influence of air pressure on human physiology is mainly to affect the supply of oxygen in the human body. People need about 750 mg of oxygen per day, of which 20% is consumed by the brain, because the brain needs the most oxygen
As long as the watch has a waterproof function, the waterproof function of a sports watch does not refer to falling into a pool or the like, but a deep waterproof in the true sense. Usually, the waterproof index in the industry is set below the depth of 30 to 50 meters. Under the strong pressure, let us understand one thing: real gold is not afraid of fire, and good watch is not afraid of water pressure.