... perfectly with all celluar systems. A real universal hards-free car kit. Easy installed and convenient o Work perfectly with all cellular ... ,NMT,GSM,PCN,DCS,PCS,CDMA,TDMAetc.A real universal hands-free car kit fits any types of cellular phones.The speaker has 1W ... a better quality sounds that you can hear than conventional hands-free kits.Can be easily installed and conveniently operated.