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Shenzhen Berait Electronic Co.,Ltd
Shenzhen Berait Electronic Co.,Ltd
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Bluetooth Smartwatch.

Shenzhen Berait Electronic Co.,Ltd
Shenzhen Berait Electronic Co.,Ltd
City: Shenzhen
Province/State: Guangdong
Country/Region: China
Tel: 86-0755-83157374
Contact Person:
Mr Alex Zhou

Bluetooth Smartwatch.

Brand Name : Berait
Model Number : S3
Certification : CE,ROSH,FCC
Place of Origin : China
MOQ : 100
Payment Terms : Western Union, MoneyGram, Western Union
Supply Ability : 100000
Packaging Details : box
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  • Model NO.:S3
  • Steps
  • Mileage
  • Calories burned
  • Sleep time
  • Heart rate
  • Wrist skin temperature
  • Wrist humidity
  • Wrist temperature
  • Barometric pressure/Altitude

1.Steps
Steps, means the steps counted during walking and running.
Steps are calculated by the 3-axis acceleration sensor in the Hesvitband. It may differ a little bit from the actual steps.
Steps are counted from 24:00 to 24:00 the next day.
WHO suggests that an adult should walk 10,000 steps per day. When your steps reach an integral multiple of 10,000, the screen will flash 10s, to congratulate you on achieving the health requirement.
2.Mileage
Mileage, means the distance you've walked and run that day.
Mileage is calculated according to the walking and running steps. Meanwhile, it is related to the individual's height (set in "my profile"). It may differ a little bit from the actual mileage.
Mileage is calculated from 24:00 to 24:00 the next day.
3.Calories burned
Exercises burned calories, only means the calories burned during exercises, not including basal metabolism. Person daily burned calories contain exercises burned calories and basal metabolism.
Basal metabolism, means the minimum energy demanded by organs to keep the body functioning at rest. It is the energy metabolism at rest, not affected by muscular activity, environment temperature, food and mental state. It varies by age, weight and physical fitness, etc.
Exercises burned calories are calculated according to the linear relationship between speed and calories. The speed is obtained via the calculated steps and mileage.
Calories burned are calculated from 24:00 to 24:00 the next day.
The more calories burned, it shows the more exercises you've done. It's a sign of good health.
4.Sleep time
Sleep time, means sleep hours. Sleep contains deep sleep, light sleep and awake moments.
Hesvitband analyses the body activity intensity according to the data from 3-axis acceleration sensor per minute. Based on the activity intensity, it determines the sleep state in current minute: deep, light or awake. It further calculates the sleep start time, sleep time and awake moments according to the sleep state per minute. When Hesvitband is put aside, it does not calculate the sleep. Errors may occur in determining the sleep state, such as sit still, hold one position for a long time, etc.
Sleep time is calculated from 18:00 to 18:00 the next day.
Calculated sleep time means the displayed sleep hours. It may delay 20-30 minutes, which is normal.
Usually, the sleep time varies by age: 5-7 years: 15 hours; 8-12 years: 10 hours; 13-18 years: 9 hours; 19-59 years: 7-8 hours; above 60 years: 5.5-7 hours. Besides, the best time to sleep is suggested from 22:00-6:00. For seniors, it's 21:00-5:00 and for children, 20:00-6:00. In addition, people feel refreshed when their deep sleep reaches 4 hours. Otherwise, they get exhausted easily.
IV. Physical Signs
5.Heart rate
Heart rate refers to the number of heartbeats per minute. Normally, it ranges from 60-100 bpm , which varies by age, gender, diet, emotion or other physiological factors and external conditions. In general, the younger has a higher heart rate, the elderly has a lower heart rate and female has a higher heart rate than their male counterparts. The normal adult human heart rate is 60-100 bpm. Ideal heart rate is 55-70 bpm (athletes tend to have lower heart rates, usually 50 bpm).
Resting heart rate is the number of heartbeats per minute at total rest. It is found that the changes in resting heart rate over time are related with the death rate due to heart disease. In general, within the normal range, the resting heart rate is: the lower, the better. Ways to lower the resting heart rate are to exercise and to lose weight.
Maximum heart rate is the highest heart rate an individual can achieve without severe problems through exercise stress. Current prevailing calculation formula is: HRmax=220 – Age.
Target heart rate is the safe range for how fast your heart should beat while you exercise, to improve the aerobic endurance level for cardiovascular system. Current prevailing calculation formula is:
Target heart rate range=(HRmax-HRrest) x 0.6 + HRrest ~~ (HRmax-HRrest) x 0.8 + HRrest. For example, a man ages 22 with HRrest of 68, his target heart rate range is: ((220-22)-68)x0.60+68=146~~((220-22)-68)x0.80+68=172, that is, 146~~172.
Normally, heart rate increases immediately after exercise and decreases fast after exercising stopped, that is, heart rate recovery time is quite short. For some person, the heart rate increases slowly and decreases also slowly. This should be cared about.
Heart rate is obtained by measuring the pulse. With the photoelectric reflection sensor, it obtains the wrist blood pulse signal. The blood pulse is consistent with the heart rate.
To measure the heart rate accurately, wear the Hesvitband tightly around a bare wrist about 2cm above the wrist joint. Heart rate test may fail in the following situations: 1) Improper wearing of the Hesvitband; 2) Too large space between the Hesvitband and your wrist; 3) Too large amplitude of the arm swings, e.g., during running or walking.
Heart rate tests automatically on the hour, such as 1:00, 2:00, etc. Total 24 times a day. Or, press and hold button for more than 2s until "--" besides " " flashes. Release the button. It starts to test heart rate.
When heart rate exceeds 100bpm, the screen will flash for 10 sec to remind the heart rate is high.
6.Wrist skin temperature
Wrist skin temperature means the temperature on wrist skin. Body temperature varies on different parts of the body and from person to person and even at different time of the day.
Wrist skin temperature is measured by the temperature sensor. Temperature sensor is usually a resistive sensor. The resistance changes with the wrist skin temperature. Ideal resistance changes linearly with the temperature. This linear relationship is used to analyze the wrist skin temperature.
Same as the heart rate, the wrist skin temperature tests and saves automatically on the hour, such as 1:00, 2:00, etc. Total 24 times a day. Or, press and hold button for more than 2s until "--" besides " " flashes. Release the button. It starts to test and save.
Temperature varies on different parts of the body. Head temperature is generally higher than foot temperature. Take forearm for example. Normally, forearm temperature is 1℃ lower than axillary temperature. Body temperature can thus be inferred. It is found in a comfortable environment, the average skin temperature is 33.8℃, with a mean deviation of 0.6℃.To maintain a comfortable average skin temperature is an important condition to ensure human thermal comfort.
V. Environment Parameters
7.Wrist humidity
Wrist humidity means the humidity of the air between wrist and Hesvitband. It is different from environment humidity, and is affected by both wrist skin humidity and environment humidity.
Wrist humidity is obtained according to the change of the electrical signal, which is converted from the amount of humidity by the temperature & humidity sensor.
Wrist humidity is tested automatically on the hour, such as 1:00, 2:00. Totally, 24 times a day.
At a given temperature in a given volume, the less water vapors present in the air, the drier the air is. On the contrary, the more water vapors in the air, the moister the air is. Most comfortable humidity is 50%-70%.
When wrist humidity becomes extremely high, e.g., 80%-95%, it indicates the user is sweating. When wrist humidity is too low, the skin becomes dry, rough, peeling, which indicates the water content of the cuticle is dropping.
According to the changes of wrist humidity, users can find out the nursing method suitable for themselves, like strengthening the skin care, adjusting the structure of diets and drinking more water.
8.Wrist temperature
Wrist temperature means the temperature of the air between wrist and Hesvitband. It is different from environment temperature, and is affected by both wrist skin temperature and environment temperature.
Wrist temperature is obtained according to the change of the electrical signal, which is converted from the amount of temperature by the temperature & humidity sensor.
Wrist temperature is tested automatically on the hour, such as 1:00, 2:00. Total 24 times a day.
When the difference between skin temperature and wrist temperature exceeds 4℃, the screen will flash for 10s, to remind the users to keep warm in cold days.
The most comfortable environment temperature in summer ranges 23-28 °C and in winter 18-25 °C. When environment temperature is above the upper limit of the comfortable temperature, people feel so warm. When it's above 37°C, people feel too hot. Usually, the maximum temperature humans can withstand is 52°C. On the contrary, when environment temperature is under the lower limit of the comfortable temperature, people feel cool and cold. When it’s under 0°C, people feel freezing.
9.Barometric pressure/Altitude
Barometric pressure is the air pressure per unit area. It is equal to the weight of the vertical air column extended upward to the aeropause above the unit area.
Altitude is the vertical distance of a location above sea level.
The barometric pressure is measured by barometric pressure sensor. The altitude is calculated according to the barometric pressure value. The conversion formula between barometric pressure and altitude is: Altitude (meter) = (1013-Barometric pressure) x 10. There is a small deviation in the altitude calculated from barometric pressure, because the barometric pressure is affected by both environment temperature and humidity.
Barometric pressure tests automatically on the hour, such as 1:00, 2:00. Total 24 times a day.
Most comfortable barometric pressure is 1bar, that is, 1013mbar. On the airplane, the cabin is pressurized, so with the barometric pressure in the range of 700-900mbar, people feel comfortable.





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