Every Cresyn earphone is artfully designed and precision engineered, reflecting the Cresyn Company heritage of 48 years in high quality consumer electronics. Cresyn is committed to bringing you personal audio gear that suits your lifestyle and satisfies your passion for a great listening experience. The C240 EG is no exception. The standard 3.5mm stereo gold-plated plug makes this unit the perfect companion for your iPod, MP3 player, laptop, portable DVD, radio, and more! With fun green accents and a frequency range of 12 Hz-22,000 Hz, this trendy and unique open air/ dynamic designed earbud ensures you the get the high quality sound experience you deserve.