1.NOIMTNAL: Φ27mm±0.5mm
2. VOCE-COIL-IMP: 8Ω±15%
3. OURPUTS、P、L. : 88±3dB
4. RESO NT-FREQ ：F0~780±20%HZ
5.FREQ-RESPONSE: F0~20KHZ输出音压
6. RATED-POWER :0.25W
7. MAX-POWER: 0.5W
8. DISTORATION:8%MAX（IKHZ-1W)
9. 动作OPERATION: 必须正常
10. 异音NOISE: 要无异常
11. 耐热试验 HEAT-TEEES: To be normal(5）±2°c Hum20~25%RH16Hour
12耐湿试验HUMMVIDIITY：To be gomal（4±）2°c Hum90~95%RH48Hour
13. 磁铁 MAGGNET：（16×7x5)mm
After sale instructions
