Data transfer standards supported by the device.
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Wi-Fi. Originally designed for computer networks and internet access, Wi-Fi is now commonly used for direct communication between devices, notably in fitness devices. While internet connectivity is possible, it's typically for specific tasks like firmware updates or saving data to network storage. The prevalent Wi-Fi version, 802.11n, theoretically offers a communication range of up to 100m indoors and 200m in open areas (though real-world figures are more modest). Newer generations boast even greater ranges. Wi-Fi modules are essential in various portable electronics like smartphones and tablets, but it tends to be less power-efficient compared to Bluetooth and ANT+.
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Bluetooth. Developed as a universal standard for direct device-to-device connectivity, Bluetooth technology comes in several compatible versions. The latest version, Bluetooth 4.0, offers a connection range of up to 100m and incorporates a low-energy communication standard, making it more energy-efficient than Wi-Fi. This efficiency is especially beneficial for compact electronics like heart rate monitors and pedometers with limited space for a sizable battery. However, Bluetooth modules are somewhat less common than Wi-Fi, with certain tablets and laptops lacking support. This is a consideration when selecting a model with this data transfer method.
— ANT+. Designed specific
...ally for sports equipment and remote control applications, ANT+ is a low-power wireless transmission technology. It facilitates connections between heart rate monitors or pedometers and various devices, including exercise machines, smartphones, and tablets. For devices with USB On-The-Go support, communication is possible through a special adapter. Higher-priced models may have built-in ANT+ support, eliminating the need for additional equipment.The degree of water protection provided for in the design of the device.
The specified underwater depth for device functionality is often given, but it's important to note that these values are somewhat arbitrary and don't accurately reflect real-world water resistance. The assessments only consider static pressure, neglecting dynamic pressure created by movement, including immersion.
Effectively, genuine water resistance can only be claimed at a minimum of 30m. Even then, such capabilities only withstand minor exposure like rain. Brief water exposure, like
swimming, might be permitted at 50m (not universally). For depths of 2 — 3m, 100m is necessary, and serious diving requires a minimum of 200m (or 300m for depths exceeding 20m).
