Features: The mono earphone is equipped with a flexible air hose part,which is more comfortable to wear while driving and sporting. Professional audio-visual function, can block noise, achieve Hi-Fi sound quality. The product is far from electromagnetic, more environmentally friendly and has anti-radiation function. The product comes with a button to control the phone, press once to answer call, hang up call or pause the music; press twice to restore music playback during pause music, or directly move to the next song. The product suitable for IOS and for Android devices. Flexible and durable wire to avoid twisting. Convenient to use, safe for driving. Specification: Plug: 3.5 mm Impedance: 16±20%0.126V, 1 kHz Frequency range: 20Hz~20kHz Resonance frequency: 4KHz±20% Rated power: 100MW L/R output difference: 3dB at 1KHz1MW Output sound pressure level: 102dB Headphone length: about 100cm / 39.4in Headphone weight: about 18g Package List: Headphones * 2 Earplug * 4 1、The mono earphone is equipped with a flexible air hose part,which is more comfortable to wear while driving and sporting. 2、Professional audio-visual function, can block noise, achieve Hi-Fi sound quality. 3、The product is far from electromagnetic, more environmentally friendly and has anti-radiation function. 4、The product comes with a button to control the phone, press once to answer call, hang up call or pause the music; press twice to restore music playback during pause music, or directly move to the next song. 5、The product suitable for IOS and for Android devices.