Plantronics are one of the leading manufacturers of Bluetooth headsets worldwide, and have been producing devices for handsfree talking for the past decade. They have become one of the symbols for quality in headsets and are also known for embedding new technologies and original ideas into their products. What we are testing is the Plantronics 645 high-end headset with DSP technology, stylish design and box content showing this high class.
The 640 model is absolutely identical to the 645 but lacks the DSP system. In small aluminum box, come a couple of extra ear-pieces for customizing, depending on the ear size, additional earhook, and special “pen” for charging the device.
The way the 645 is charged is very interesting: you put the headset in a charging cradle with the manufacturer’s name on it, which has a port for the charger on the bottom; but instead of the standard Plantronics charger, you have many other options: the box comes with four adaptor rings, which can be attached to the cradle in order to be used with a common phone- or miniUSB- charger. In addition, a bigger ring can also be attached. It houses a standard AAA battery, which will charge your headset when you put it in the cradle in your pocket, between the calls.
When it starts charging, the cradle will vibrate once and the headset will blink in red. When it is completely charged you won’t get any indicator about this – the LED will stop blinking. In our opinion this is not logical, and the LED should indicate it with constant red or blinking red-blue light.
