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iPhone must be within about 33 feet (10 meters) of the Bluetooth device.

Multiple Bluetooth speakers can be connected at once, but only one device can be selected to receive the audio output. Some speaker manufacturers build in the capability to pair or chain several Bluetooth speakers together. Users can send music or other audio streams to all the speakers simultaneously.

Bluetooth technology offers a convenient and fast way of connecting smart-driven devices. ... Fortunately, it's easy to overcome this range limitation with the best Bluetooth extender. These plug-and-use devices normally extend your Bluetooth Wireless range up to 100 feet indoors and 300 feet outdoors.Nov 9, 2021

• Bluetooth v3 and v4 devices have a maximum transmission speed of up to 24 Mbps.

• Range of Bluetooth is dependent on its class and primarily there are three classes of Bluetooth: Class 1 transmitting at 100 mW with a range of 100 meters or 328 feet. Class 2 transmiting at 2.5 mW with a range of 10 meters or 33 feet (most Bluetooth headsets and headphones are common Class 2 devices). Class 3 transmitting at 1 mW with a range of fewer than 10 meters.

• The Bluetooth Core Specification mandates a range of not less than 10 metres (33 ft), but there is no upper limit on actual range.

To enjoy a longer range, you need to have an extender that receives Bluetooth from a long range too. For instance, if an extender receives Bluetooth signals from a range of 85 feet and extends the range by 85 feet, then you will have extended your Bluetooth range to 160 feet.

But radio waves can still pass through objects, even concrete walls and floors, meaning that a Bluetooth^® signal is not limited to the room you're in. ... These barriers will have an impact on the overall range of the signal, but they don't block it.Oct 9, 2019

Checking your Bluetooth signal strength is easy if you know what you're looking for. Bluetooth signal strength is measured by the Received Signal Strength Indicator (RSSI). You can access the device's RSSI by accessing the Bluetooth device settings and then reading the RSSI. An ideal RSSI is between -40 and -55.

Change the position or location of the unit or connected device. If the connected device has a cover on it, take it off to improve the communication distance. If the connected device is in a bag or in a pocket, try moving the position of the device. Place the devices closer together to improve signal transmission.Sep 2, 2020

You cannot increase the speed of Bluetooth. You can use XENDER or ShareIt like filetransfer apps which uses WiFi direct . It is fast and transfers files at 3MB/s .

Haavitek Long Range 300 feet (100 Meter) Bluetooth Transmitter Receiver V5. 0 Wireless Optical RCA 3.5mm Audio Adapter for TV Audio, PC & Home Stereo Speakers,Dual Link, aptX Low Latency & aptX HD.

Officially Class 3 radios have a range of up to 1 metre (3 ft), Class 2, most commonly found in mobile devices, 10 metres (33 ft), and Class 1, primarily for industrial use cases,100 metres (300 ft).

Water, bricks and marble have a medium capacity for blocking Bluetooth. At the bottom of the list are wood, glass and synthetic materials like plastic.

Your best bet is either a metal or a thick partially conductive ceramic to block the bluetooth. Concrete is one example, but you'd need a very thick piece. You'd also have to ensure that the concrete is large enough such that the wave won't refract around it.

Bulletproof glass, plaster, and concrete too weaken Bluetooth signals but not as much as the metal objects. Marble, water, and bricks have a mediocre tendency to inhibit the signals. Besides, plastic, glass, and wood can also block a Bluetooth device's signals.