[Multifunctional microphone] Our headset has a built-in microphone, as well as volume control, switching audio tracks, making and receiving calls and other functions. Multi-function keys provide you with a simple and convenient experience [Noise reduction function] The in-ear earphones are designed with sturdy soundproof materials, which can reduce external noise while minimizing sound leakage to obtain clearer sound [Sturdy material] The earphone cable is made of super-elastic pvc material, which improves the wear resistance of the earphone cable itself, effectively avoids the trouble of frequent bending of the earphone cable, and prolongs the service life of the earphone [Compatibility] In-ear headphones are compatible with MP3, tablet computers, mobile phones, PCs and other devices with a 3.5mm headphone port [High-quality after-sales service] If you have any dissatisfaction after receiving the headset or during use, you can contact us and we will do our best to help you solve the problem