Specially designed for Polar Verity Sense / OH1 heart rate monitor. Built-in voltage stabilizer to protect the watch from damage caused by overcurrent when connected to the power supply. With the over-voltage and over-current protection function, the device can be protected from damage during charging. With the USB interface, it can be connected to any USB port for charging, which is very convenient. It is recommended to use a micro current charging adapter to charge, or use a laptop USB interface or computer USB interface to charge directly, as their voltage is more stable. To avoid damaging the battery, please do not use a fast charger to charge. It is recommended to use a 5V charger. Dimensions: 43.5 x 30 x 11.3 mm
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