-3.5mm plug,32ohm or 300 ohms - CE&Rosh certificate - Logo printing is avaible. - Competitive price with good quality Good Sound Earphones description: 1.This kind of earphone is suitable to use in airlines,trains,buses,hospital,MP3 player,etc.2.Four kind of plugs for choice:3.5mm single pin,double fixed pin,folding pin,1 in 2 transfor.3.Certificate: CE & ROSHModel FS-040 feature: 1.MaterialABS2. ...