1/8in/3.5mm plug No batteries needed,just plug and go Light weight,less pression Lowest price with HiFi music Name: GEP1 Audio Music headphone with 1/8 in plugModel No.:GEP1Feature:1/8in/3.5mm plugNo batteries needed,just plug and goLight weight,less pressionLowest price with HiFi musicSimple and clean designApplication:basketball sport,MP3,MP4,Ipod.. GEP1 Audio Music headphone with 1/8 in plug