The Bluetooth version of V5.0 + EDR communicates within 15 meters, and is not affected by the signal. The effective receiving range is up to 15 meters. Wearing it when sleeping can help you sleep better by listening to light and soothing music. Bluetooth headband is equipped with free volume manager, which can adjust the volume freely according to the scene. Cationic soft and comfortable fabric makes it lighter to wear. Built in 200mAh lithium battery, which can be recycled.
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