Dimension: Outer Diameter 18.5mm Baffle Opening 8.8mm Height Refer to drawing in details;

Nominal Impedance: 8 Ohm±15%    At1000 HZ

Power Rating: 1.0 watt     Maximum  1.5  Watt

Lowest Resonant Frequency: 400±20% HZ

Output Sound Pressure Level(S.P.L): 87 ± 3db/1 Watt.1Meter.Average at800,1000,1200,1500HZ.

Frequency Range: FO-2 KHZ ,Average SPL±10db

Distortion: 3%Maximum At1000HZ  1.0 W

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

Load Test: Bt Audio Singnal Generator At 2.83 Volts.total 48 hours and20~20KHZ Resonant Frequency

Abnormal Sound Test: Must be Normally tested Bt 2.83 Volts Sinwave

Operation Temperature: -20℃ ~  + 50℃ 

Storage Temperature: -40℃ ~  + 60℃