Style:In-Ear Communication:Wireless Connectors:USB Use:Portable Media Player Function:Microphone,Waterproof,Noise Cancelling,Bluetooth Product name:U-mini Bluetooth Version:V4.2 Color:black Battery Capacity:50mAh Charging Box:1000mAh Working time:2.5 hours Total weight:60.5g Certificate:FCC,BQB,CE,ISO-9001,TELEC,ROHS Feature:Comfortable Wearing Keyword:BLuetooth Stereo Earbuds Show More