Brand Name:Awei Style:In-Ear Line Length:0.6m Resistance:16Ω Package:Yes Use:Portable Media Player Communication:Wireless Plug Type:Wireless Sensitivity:90±3dB Connectors:USB Is wireless:Yes Function:Bluetooth,Noise Cancelling,Microphone,For Internet Bar,Monitor Headphone,for Video Game,Common Headphone,For Routine Office Work,Wireless Headphone,For Mobile Phone,Portable,For iPod,HiFi Headphone,Sport,Voice control,Supports music With Microphone:Yes Frequency Response Range:20-20000Hz Model Number:A921BL Bluetooth specification:V4.0 color:black,gold,blue Operating range:10m Talking time:about 6 hours charging time:about 1 hours noise reduction:CVC6.0 Function:answering,end,refused,volume adjustment listen to music pause/play,