Dimension :  Outer Diameter44mm Baffle Opening14.5mm

Nominal Impedance :  8Ohm±15%    At1000 HZ

Power Rating :  5 watt     Maximum  8 Watt

Lowest Resonant requency  :  280±20% HZ.

Output Sound Pressure Level(S.P.L) :   83 ± 3db/0.1 Watt.10CMeter.Average at800,1000,1200,1500HZ.

Frequency Rang :  260HZ -20 KHZ ,Average SPL±10db

Distortion :  5%Maxium At1000HZ  5 W

Polarity :  Diaphragm shall move forward when Apply a Postive DC current the "+" or"Marked" Terminal

Load Test :  Bt Audio Singnal Generator At 6.32Volts.total 48 hours and20~20KHZ Resonant Frequency

Abnormal Sound Test :  Must be Normally tasted Bt 6.32Volts Sinwave

Weight : 58g