Plantronics Explorer 390 User Guide - Page 4

What is Bluetooth - bluetooth headset

Page 4 highlights

What is Bluetooth®? Bluetooth wireless technology provides a way for devices to communicate with each other using short-range radio frequency instead of wires. Any two Bluetooth devices can communicate as long as they both have Bluetooth turned on, they are within range and they have been paired - a quick "handshake" process that connects the two devices. Bluetooth range is up to 33 feet (10 meters). Obstructions such as walls or other electronics devices can cause interference or shorten the effective range. NOTE For optimal performance, place your headset and phone on the same side of your body.

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What is Bluetooth
®
?
Bluetooth wireless technology provides a way for devices to
communicate with each other using short-range radio frequency instead
of wires. Any two Bluetooth devices can communicate as long as they
both have Bluetooth turned on, they are within range and they have
been paired — a quick “handshake” process that connects the two
devices. Bluetooth range is up to 33 feet (10 meters). Obstructions such
as walls or other electronics devices can cause interference or shorten
the effective range.
NOTE
For optimal performance, place your headset and phone on the
same side of your body.