1-1 SCOPE | This specification is a typical speake unit fo telephone hand set | 1-2 DIMENSIONS | As shown in fig (1) | 1-3 NET WEIGHT | APPROX. 1.2 gams | 1-4 OPERATINGTEMPERATURE | -30℃ to +70℃ | 1-5 STORAGETEMPERATURE | -40℃ to +85℃ | 2.ELECTR0ACOUSTIC CHARACTERISTICS | 2-1 TEST SET UP | Measuing conditions and pocedues shown in fig(2) | 2-2 IMPEDANCE | 8Ω±15% ohm ( at 1 KHz, 0.9Vms ) | 2-3 SOUND PRESSURELEVEL | 85dB ±3dB SPL /1.0W/10mm at 800、1000、1200、1500Hz .AVE | 2-4 FREQUENCYRESPONSE | 800±20%HZ | 2-5 INPUT POWER(NOM./MAX.) | 1.0W/1.2W | 2-6 AUDIBLE NOISE | Must be fee audible noise (buzzes and attles)(200 ~ 10KHz fequency ange ,input level up to 2.83Vms) | 2-7 DISTORTION | Less than 10% at 1KHz 1.0W |