Comparison MIFO O4 vs MIFO O5

The headphones have their own volume control. Such a regulator can be placed both on the wire and on one of the cups (the latter is typical for wireless models). Anyway, this function allows you to easily adjust the volume: for this you do not need to go into the computer settings, press the buttons on the player or smartphone, etc., just use the control at hand. On the other hand, additional equipment complicates and increases the cost of the design, and also increases the likelihood of distortion. In light of the latter, volume control is almost never found in professional headphones.

The declared operating time of headphones with autonomous power supply (see above) when listening to music on a single battery charge or a set of batteries.

As a rule, the characteristics indicate a certain average operating time in music listening mode, for standard conditions; in practice, it will depend on the intensity of use, volume level and other operating parameters, and in models with replaceable batteries - also on the quality of specific batteries. However, based on the stated time, you can fairly reliably assess the autonomy of the selected headphones and compare them with other models. As for specific values, relatively “short-lived” devices have a battery life of up to 8 hours, a figure of 8 – 12 hours can be called quite good, 12 – 20 hours – very good, and in the most “long-lasting” headphones the operating time can exceed 20 hours.

Feature in headphones wireless models of true wireless type (see "Connectivity"). In this case we are talking about charging not the headphones themselves, but a cover (case). Such a cover is equipped with its own battery, from which the "ears" inside are charged — in the usual, contact way; but the case itself can support wireless charging.

The convenience of this feature is obvious: it allows you to do without regularly connecting and disconnecting the cable. Actually, to start charging, it is enough to place the case on a special wireless charger platform. The main disadvantage is that the chargers themselves are not cheap and in the vast majority of cases are not included in the set.

The type of connector used for charging the built-in battery of headphones, more specifically, for connecting an external charger. Such a device can be a wall or car adapter, a power bank, or even a USB port of a PC or laptop (if you have the appropriate cable). In true wireless models (available with a stem, without a stem, with over-ear attachment, and clip-on), the “charger” cord connects to a special docking station where the “buds” are placed for charging (while the station itself usually has its own battery and can also function as an independent power bank). In wireless and combined solutions of a more traditional design, the charging input is often located on the headphones' body. Regarding connectors, the most common options are:

— microUSB. A smaller version of the USB connector, created for portable devices. It appeared quite some time ago but remains popular even nowadays and is used by the vast majority of manufacturers.

— USB-C. A miniature USB connector, positioned partially as a potential successor to microUSB. Unlike its predecessor, it features a reversible design that allows the plug to be inserted into the port any side up. It is still relatively rare, but it is highly likely that the situation will change in the coming years.

...— Lightning. A proprietary connector by the company Apple. Like USB-C, it has a reversible design, but is somewhat more convenient and reliable. However, the use of Lightning is limited to products from Apple itself and its owned brand Beats.

This feature means that the controls in the headphones are not traditional buttons that you need to press, but sensors that are triggered by touch.

Touch control is somewhat more expensive than push-button control, but it has a number of advantages over it. Firstly, it gives the headphones a neat and technological appearance, with a minimum of protruding parts. Secondly, due to the absence of moving parts, the sensors are more reliable and compact. Thirdly, it is purely physically more convenient to use them, especially with the small size of the headphones. These moments are especially relevant for the "ears" of the true wireless format (see "Type of cable"), so it is in them that touch control is most often found. However, there are exceptions to this rule. Also note that the difference in price between buttons and sensors is often almost imperceptible compared to the cost of headphones in general.