Item name:Model 7100Bluetooth version:V4.0Support:A2DP，AVRCP，HSP，HFPDrive unit:Diameter 10mmSpeaker Impedance:16 ohmSensitivity:110dBCommunication distance:10mFrequency response:20-20kHzDistortion:<0.1%(THD)Talking time:More than 8 hoursPlaying time:More than 8 hoursStandby time:More than 180 hoursCharging time: about 2 hoursCharging port: Micro-USBProduction size: 20.5*9*52mm