1.Designed to ears hanging, convenient use
2.Fine workmanship, reliable performance
3.Smart,durable and elegant in modle design
4.For medium and heavy hearing disorders to use

1.The maximum saturation level:125dB±4dB
2.Full of gear noise gain:≥38dB
3.Hharmonic distortion:when F acuities 1KHz than 15% 
                                       when F 1KHZ acuity than 10%
4.Equivalent noise input:≤30dB
5.Working voltage:1.5V
6.Working current:10.8mA

1.Before using, open the doors with the thumb and spin down gently.Don't open doors too wide, avoiding breaking doors.

2.Add a button batteries according to the positive direction, and shut batteries doors.

3.Connect the soft rubber plugs to fit the shredded hard.

4.When wearing,firstly hang ear hook,then wear soft rubber plugs tightly.

5.Dial to the "N" gear to adjust the volume knob "1, 2, 3, 4 (4-1 in increasing), until you hear the clearest voice.

1.Prohibit otitis media or ear rotting patients to use.
2.If not use for a long time, remove the battery . Avoid hearing components being rusted by batteries.
3.Please clean earplugs or eardrum regularly to guarantee the normal hearing .
4.Shockproof, moistureproof, prevent heat.
5.First using,you may feel uncomfortable.After a period of time,you will adapt.
6.When not in use, push button switch to "OFF",and use dry cloth or hearing special cleaner gush to clean hearing-shell, then stored in dry place with no corrosive gas.