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Reminder: The new version of the heart rate armband has arrived. The new package has been replaced with a spare armband, and the heart rate alarm function has been added. The heart rate threshold can be set. If the back armband is exceeded, it will always vibrate to remind you.
Blackbird dual-mode Bluetooth&ANT+ photoelectric heart rate armband features:
1. Accurate exercise heart rate detection
2. Standard ANT+/Bluetooth dual mode, which can connect to various brand stopwatches, sports watches, mobile APPs and real scene systems at the same time
3. The photoelectric sensor is more comfortable to wear
4. Rechargeable lithium battery 20h continuous use
5. IP67 waterproof
6. Detection distance of 10 meters
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