Comparison Poly M70 vs Poly M55

A device designed to fix the device on the auricle; most often represents a signature shackle. Such a shackle is very popular among Bluetooth headsets — this is the easiest way to hold a relatively large device on your ear. At the same time, ultra-compact models can be fixed directly in the ear and do not need a behind-the-ear hook. And for car kits and speakerphones (see "Device"), such a mount is not required.

Note that the shackle is most often made swivel, which allows you to reposition it from the left to the right ear and vice versa.

The type of connector used to charge the built-in battery of Bluetooth headsets, more precisely, to connect an external charger. The role of such a device can be played by a network or car adapter, a power bank, or even a USB port on a PC or laptop (if you have the appropriate cable).

— microUSB. A smaller version of the USB connector designed for portable devices. It appeared quite a long time ago, but it does not lose popularity nowadays, despite the active implementation of the USB-C port.

— USB-C. A miniature USB connector, positioned, among other things, as a potential successor to microUSB. Unlike its predecessor, it has a double-sided design, thanks to which the plug can be inserted into the socket in either direction. It is still relatively rare, but the situation is likely to change in the coming years.