Morse code is a time-interrupt signal code, which expresses different letters, numbers and punctuation symbols in different order. It was invented in 1837 by American Samuel Morse Morse code, an early form of digital communication, which played an important role in the early radio and was known to every radio communicator. As a result of advances in communication technology, Morse codes were discontinued in 1999. We can customize bracelet with the morse code on. The band can be solid, swirled, segmented, glowing and UV transfer. Morse code can be printed, colorfilled, embossed printed. Regular sizes of a rubber bracelet are 6”(150mm) for toddler, 7”(180mm) for youth, 8”(202mm) for adult in circumference and 1/4”(6mm), 1/2”(12mm), 3/4”(19mm), 1”(25mm) in width. We make it all together 2mm thickness. ut the detection accuracy of different hand rings is also different. Generally speaking, the current bracelets can recognize some simple movements, such as cycling, walking, the price gap between different bracelets, millet bracelets, Huawei bracelets and so on. For a friend who loves fitness, we know that heart rate is an important parameter. The heart rate calculation of aerobic exercise is studied by experts and scholars. By comparing the heart rate after aerobic exercise (temporarily called actual heart rate) with the target heart rate, when the actual heart rate is within the range of the target heart rate, aerobic exercise can be considered effective and normal; when the actual heart rate is lower or higher than the target heart rate, aerobic exercise is ineffective, and the exerciser is slightly less effective. Micro-control the amount of exercise, so as not to let aerobic exercise into "aerobic exercise". The relationship between specific aerobic exercise and heart rate has the following empirical formulas: 1. The actual heart rate of aerobic exercise: the maximum of heart rate per minute. 2. Target Heart Rate Range of Aerobic Exercise Primary Formula: For people in poor health. Target heart rate = (200-age)* (60%-80%) 60%~70% is mainly used to reduce fat, 70%~80% is mainly used to improve cardiopulmonary function. General formula: for the general population. Target heart rate = (220-age)* (60%-80%) 60%~70% is mainly used to reduce fat, 70%~80% is mainly used to improve cardiopulmonary function. Caffonen formula: for people with higher physical fitness. Target Heart Rate=(220-Age-Resting Heart Rate)*(65%-85%)+Resting Heart Rate 65%~75% is mainly used to reduce fat, 75%~85% is mainly used to improve cardiopulmonary function. According to the above formula, everyone can be seated. If the bracelet has heart rate detection function, the actual heart rate during exercise can be measured in real time, so that you can judge whether your aerobic exercise is effective. There are not a few bracelets on the market for heart rate detection, and the accuracy of each bracelet has not been fully evaluated. My suggestion is that if you want to get a better fitness experience, quantify the fitness data, you can buy them according to your own economic conditions. &customize keychainnbsp; cheap-silicone-wristbands-canadabusiness-silicone-wristbands ectronics and computers, household gardening supplies, toys, baby products, food, clothing, shoes and jewelry, health and personal care supplies, sports and outdoor. Supplies, toys, automobiles and industrial products. We can also buy custom silicone bracelet from amazon stores. Let me show you how to distinguish rubber bracelet. First, the false silicone bracelet is easy to suffer from deformation while the true one has good memory to snap back and relatively small permanent deformation. Second, the real silicone bracelet touches smoothly with special surface treatment and easily stick with dust , hair and other impurities. Third, when it burned with fire, the false silicone bracelet will come up with the black material on the edge while the true one shows white powder. And final, tell a reliable method to clean the bracelets. Get it soak in warm water for 3-5min, rub a few and add the detergent if necessary. Then all done after drying by air. Using coupon SAVE10, we offer 10% dicount for the total price. Besides, order less than 100pcs, get 50pcs free and 5pcs keychains free. Order 100pcs or more, get 100pcs free and 10pcs keychains free. All the free wristbands andcustomize keychain keychains are same design of the one you order.