Jack stereo earphones and headphones are audio devices that connect to various audio sources, such as mobile phones, computers, laptops, MP3 players, or other audio devices, with a 3.5 mm jack plug. These earphones and headphones provide stereo sound, meaning that the two sides (left and right) handle separate sound channels, which provides a surround and more balanced music experience.

3.5 mm jack connector
This connector is the most common standard in the world of headphones and audio devices. It is compatible with almost all traditional devices, although some smartphones have already abandoned this port in favor of wireless technologies.

Stereo sound
The two separate sound channels provide different sound for the left and right ear, which provides a surround experience. This improves the musical experience, especially for recordings where different sounds and instruments come from different directions.

In-ear headphones
They are small, easy to carry, and are located directly inside the earpiece. These often have rubber bell or silicone ends to provide a comfortable fit and noise isolation.

Headband (over-ear or on-ear) headphones
These are larger in size and are located on or around the ear. They provide better sound quality and greater comfort during prolonged use.

Noise insulation
Many jack headphones offer passive noise isolation, especially in-ear types, which fit into the ear canal to block outside noise. Some premium models also provide active noise cancellation, which electronically reduces ambient noise.

Cable and control
The cable of the earphones can be of different lengths, and some models also include control buttons for controlling the volume, answering calls or changing music tracks. Cabling is often made of durable material and in some cases has a flat design to avoid tangling.