Is Bluetooth 3.0 and 4.0 compatible?

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I have earphones and this is Bluetooth 3.0.

I bought a new cell phone this time, but I haven't received it yet, but it has Bluetooth 4.0.

Will Bluetooth 3.0 and Bluetooth 4.0 be compatible and connected?

2910 4 8 years ago

pu1. Bluetooth is currently available up to version 4.0, but the most commonly used version of Bluetooth device is 2.0, 2.1+EDR
With the latest Bluetooth machine, it wouldn't have ruined existing Bluetooth devices obsolete.

2017-11-13

pu2. You can use it even if the two products you want to connect through Bluetooth are different versions.
The performance will be adjusted to the lower version, so the speed will be adjusted to version 3.0.

2017-11-13

pu3. Bluetooth 3.0 has a transmission speed of 24Mbps and Bluetooth 4.0 is a technology that focuses on reducing power consumption and making the product size smaller, so the transmission speed is 1Mbps.
Usually, if the version is different, it fits the lower version, but Bluetooth 4.0 is lower than 3.0, so it might work at a faster speed

2017-11-13

pu4. Thank you for kindly telling me

2017-11-13

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