No external power supply, plug and playModel: CSR4.0Interface: usbTransmission rate: 3 (Mbps)Effective working radius: 30 (m)Bluetooth standard: 4.0Working frequency: 50 (MHz)
Product size: 26*15*7(mm)
Secure payment
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Refund in case of loss of the parcel
Refund for non-delivery
Refund if the item is damaged
