Technical SpecificationsANSI 3.22-1996UnitMax-SSPL 90130dB SPLHFA-SSPL90121dB SPLFull On Gain47dB SPLFrequency Range450-3500HzTHDat500Hz:2.4%800Hz:2.3%1600Hz:0.2%EQ. Input Noise LevelBattery Current Drain4mARated VoltageD.C 1.5V1. According to their own ear size, choose for earplugs, ear plugs and headphones connected2. Plug in the charger directly3. Shut down the charge, do not touch the random touch4. Rotate the connector and adjust the appropriate angle5. Before wearing, turn off the hearing aid switch and keep the volume to a minimum6. Place the hearing aid in the ear canal to adjust the position, into, without leaving a gap7. Turn on the switch and adjust the appropriate volume8. Turn off the power before taking the hearing aid
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