... to listen to MP3 from cellphone.5.Talking time:up to 6H,Standby time:about 180H6.Internal,nonremovable,rechargeable battery7.No wires,no limits,bluetooth ... function ,more attractive10.CE,FCC,RoHS approvalProduct specification:Bluetooth Version: v2.1 + EDRProfiles:Headset,Handsfree,AVRCPClass:2Operation Range:10MTalking: 5 HoursListening Time ...