E1 Wireless Bluetooth Earphone has 4.1 Bluetooth version and it is very fast speed with high quality‎.‎Bluetooth transmission scope is within 10m and transmisssion frequency is 2.4GHz‎.‎ After charging for about 1.5 hours‎,‎ you can talk over 4 hours‎,‎ listen to music for over 3 hours and standby time is over 55hours‎.‎ It supports Apple Iphones and partial Android mobile phones‎.‎ And another point is it can be connected two phones simultaneously‎.‎ Four kinds of language‎(‎ Chinese‎,‎ English‎,‎ French and Spanish‎)‎ are available but the default language is English‎.‎This product is now available at shop‎.‎com‎.‎mm online shopping mall‎.‎