th Headphone with Microphone.Bluetooth Version: 3.0 + EDR JianrongSupport Profiles: HSP, HFP, AVRCP,A2DP (Advanced Audio Distribution Profile)Operation Distance: 10m; Class 2Frequency Range: 2.4 GHz ~2.4835GHz ISM band.?Sensitivity: - 85dBMusic Formats: MP3 / WMA.?Supports TF / Micro SD Card (128M ~ 32G)FM Frequency: 87.5 ~ 108.0 MHzSpeaker Diameter: 40mm.Sensitivity: 115dB S.P.L at 1KhzResistance: 32ohmFrequency Response: 20Hz ~ 20KHzRated Power: 40WMicrophone Unit: 4mm * 1.5m -42dBPlug Type: