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    Mini DJ Bass Bluetooth Speaker B28 Protable Music Wireless Speaker Bluetooth Subwoofers With USB and TF

    1. Support hands free calls

    2. Surround stereo voice.

    3. Echo and noise cancelling

    4. Support TF card and USB flash disk

    5. Support FM Radio

    Bluetooth Version: V3.0 with EDR

    Working Distance: At least 10 Meters

    Battery: Built-in rechargeable Lithium battery 1800mAh

    Music Time: 4 hours around

    Charging Time(hrs): 2 Hours

    Sensitivity: 70DB

    Speaker Impedance: 4Ω, 5W*2

    Charger Voltage: DC 5V

    Operation Frequency: 100Hz ~15KHz

    Supported Profiles: HSP,HFP,A2DP,AVRCP