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    Product Description: Bluetooth wireless head phones
    Blue tooth protocol standards: Blue tooth V2.1+EDR
    Receiver range: 10m / 360*
    Carrier frequency: 2402MHz2480MHz
    USB Interference: High speed USB 2.0
    Battery: Chargeable Lithium-Ion polymer battery (3.7V/320MA/h)
    Charger power: Computer USB interface DC5vDC5V (500MA)
    Travel charger, DC 5V (500MA) car charger
    Successive working time: about 10 hours
    Frequency response: 20Hz
    S/N ratio: 82db

Speaker Parameter

    Speaker diameter: 40mm
    Impedance: 32Î©
    S.P.L: 106db S.P.L. at 1 KHz
    Rated power: 20MW
    Aggregate capability: 40MW
    Frequency Response: 20Hz20,000Hz

Microphone Parameter

    Mic dimension: 4*1.5mm
    Mic Direction: Omni directional
    S.P.L.: 52+2db
    Impedance: <2.2KÎ©
    Frequency response: 30 Hz 16,000Hz
    Power supply: 3.0V