Comparison Poly Explorer 500 vs Poly M70

— Mini-Jack (3.5 mm). The Mini-Jack is one of the most popular wired connectors. However, it is not used in Bluetooth headsets and is rarely found in other specialized accessories, primarily serving an auxiliary function. In speakerphones, the mini-Jack typically connects multiple devices, and in car kits, it outputs sound to the car's radio or standard audio system. Note that the headphone jack in this case is not considered a 3.5 mm connector, although it is most often made in this format.

— USB-A. The classic USB-A computer connector is gradually being replaced by the USB-C connector. The purpose and use of such a connection depend on the type of device. For example, USB in speakerphones is the standard connector for wired connections to both computers and specialized communication systems. In Bluetooth headsets, this means it is equipped with a USB adapter for connecting to PCs without a Bluetooth module.

— USB-C. A port similar in purpose to the one described above, but with a more modern symmetrical design that doesn't require correct orientation, and consequently allows for higher speeds.

— Bluetooth. Nowadays, Bluetooth is essentially the standard interface for wireless connectivity to gadgets like headsets and other audio accessories. This technology is well-suited for audio transmission but can also be used for additional functions su...ch as remote control. The capabilities depend on the version, with notable ones being Bluetooth v5.0, Bluetooth v5.1, Bluetooth v5.2, Bluetooth v5.3, Bluetooth v5.4, and Bluetooth v6.0. Generally, the newer the version, the more advanced the platform: for example, Bluetooth 5.0 offered a noticeable increase in range, speed, and support data transfer capabilities, while Bluetooth 5.2 has become particularly important for audio devices as a foundation for LE Audio.
For headsets, this means that new versions provide more efficient operation, more modern audio functions, and better compatibility with current gadgets.

The maximum distance from the headset to the signal source at which it can be used normally.

Note that this indicator is stated for optimal conditions; the actual communication range is often lower than the claimed one due to obstacles in the signal path and extraneous interference. However, the minimum range for Bluetooth accessories is actually 10 m, which in fact, usually, gives at least 5 – 6 m — and this is quite enough for comfortable use. There are also more "long-range" solutions, with a range of up to 50 m or even more. However, it is worth remembering that Bluetooth is a two-way communication, and the range claimed in the specs must be supported not only by the headset itself, but also by the device with which it is used.

Also note that a long range means not only the ability to communicate over a long distance, but also a good ability to work through obstacles such as thick walls. Therefore, a powerful Bluetooth device may be necessary even at a short distance — if there are obstacles at this distance.

Time of operation of the self-powered device (see "Power") on one battery charge.

Usually, the battery life in the talk mode is meant, when the device consumes the most energy. In headsets with high-capacity batteries, this battery life can be 9 hours or more. However, talking for several hours without pauses is almost impossible, so in fact the operating time is noticeably longer than in the specifications. So, a headset with an operating time of the same 9 hours is most likely quite enough for a 12-hour work shift, even if you have to constantly make calls through it; and if we are talking about only 5 – 6 calls per day, then the charge is guaranteed to last for several days, or even a week. At the same time, the difference in the claimed operating time is usually quite consistent with the difference in actual battery life, and it is quite possible to compare the real capabilities of different models by it.