The first number of the IP rating refers to protection against dust, while the second number refers to protection against liquid. E.g. a first number of 6 denotes that it is completely dustproof, and a second number of 7 denotes that the device can withstand full immersion in water.
We consider a lower weight better because lighter devices are more comfortable to carry. A lower weight is also an advantage for home appliances, as it makes transportation easier, and for many other types of products.
True wireless devices have no cables connecting any part of the device together. This is an important distinction as some wireless earbuds have cables connecting the two earbuds together.
These earbuds come with wingtips that can be attached for a more secure fit. Wingtips come in handy for sports and other physical activities. When used correctly, they prevent the earbuds from falling off.
Resistance to sweat makes it ideal for use while doing sports.
The device is dustproof and water-resistant. Water-resistant devices can resist the penetration of water, such as powerful water jets, but not being submerged into water.
The in-ear device is ultracompact and lightweight, with little or no interference with earrings, spectacles, hats, or hairstyles. It is inserted in the ear canal itself and blocks out a lot of environmental noise. It has stronger bass tones and is unlikely to fall out of the ear.
The earbud form is ultracompact and lightweight, with little or no interference with earrings, spectacles, hats, or hairstyles. For some people it is more comfortable than in-ear form.
Devices with stereo speakers deliver sound from independent channels on both left and right sides, creating a richer sound and a better experience.