Handset features:1) design accord with human body engineering， wearing a simple way， the overall simple compact， easy to cae carry2) Products meet the latest enviromental protection standard， all raw materials， non-toxic， no halogen， use at ease safe3) 1.2M standard high quality wire， soft and comfortable， flexible use， USES high-grade antioxidant OFC enamelle copper wire， the signal propagation speed，small distortion， the sound quality more perffect4) standard 3.5mm stereo plug straight， wide application scope， pin and handness strong， pp with copper alloy material， plug greatly extended service lifeKind reminder:1) Please wear correctly when you use the earphone ， put earplug with "L" in lefe ear， warplug with "R" in right ear2) when listening to music with the earphone， we suggest you adjust the sound volume to a proper level to protect your eardrum3) to ensure your safe driving ， please follow these tips to keep earphone clean and dry， stay the earphone aways from magnetic field.