What's in the box:

K2 3.5mm Wired Headphones In-Ear Headset Stereo Music Earphone Smart Phone Earpiece Earbuds In-line Control w/ Microphone (Silver)

Features:
Lightweight in-ear headphone provides natural clear sound and super enhanced bass.
Noise isolating in-ear design blocks ambient noise to help you focus on listening pleasure.
Tangle-free cable with 3.5mm universal earphone jack is suitable for 3.5mm audio devices.
Built-in microphone enables you to make and answer calls hands-free while doing sports.
You don't have to worry about running out of power, give you unlimited wired listening.

Specifications:
Plug: 3.5mm
Sensitivity: 119dB
Impedance: 32O
Frequency response: 20Hz-20KHz
Color: Red, Grey, Silver, Green, Blue (Optional)
Cord Length: Approx. 1.1m / 3.6ft
Headphone Weight: 13g / 0.45oz
Package Size: Approx. 11.0 * 6.0 * 1.0cm / 4.33 * 2.36 * 0.39in
Package Weight: 15g / 0.55oz

Packing List:
1 * 3.5mm Headphone