First turn on the Bluetooth Settings and enter the visible state. At this time, other mobile devices in the range of Bluetooth signals can find the mobile device, and can complete the pairing with it, after the successful pairing can be used for data communication through Bluetooth.
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However, when it is set to the visible state, it can generally be found by other devices in the range of 10 meters, and the distance cannot be modified. Even if the two Bluetooth devices are within 1 meter, they will be searched by many devices within 10 meters.
Usually 5-10 meters. Some enhancement adapters can reach 10 meters away, but this refers to the maximum distance between the phone and the Bluetooth headset without obstacles. Affected by the environment in use, the actual effective call range is between 5-8 meters. Now most mobile phones and mobile devices use the PowerClass2 standard transmission distance of 10 meters.
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The way to increase the receiving distance of Bluetooth headphones:
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Make a homemade antenna, preferably in an arc shape, and attach it to the exposed metal of the headset.