Super Air USB Rechargeable Earphone with Adjustable Volume

Tips for buyers: The cause of howling/noise: The internal amplifier and the microphone are close to each other of the , and the sound is continuously received and expanded, so it has a certain poibility of produce howling after power-on. At present, small hearing aids and high-power hearing aids on the market can hardly avoid howling, and only full-digital hearing aids can avoid howling. Ways to avoid howling/noise: 1. When the power is high (the amplified sound is large), howling is more likely to occur. Therefore, gradually increasing the volume from low can effectively avoid howling. 2. When the ear canal is completely sealed, there is no howling sound. Therefore, please use hearing aids after cleaning your ear canal, and test the earplugs from large to small to find the most suitable earplugs. 3. After the enters the ear canal, it is recommended to push the with your fingers and hold it for 1-2 seconds, and then release it to fully extend the earplug. In addition: If you do not know how to use it or there is a problem with your , please do not rush to leave a negative review and contact us. Thank you.
Features 

 

• The come with rechargeable function, no need to change battery 
  
   
• The  combines a cosmetically appealing look with the smooth sound an internal speaker 
  
   
• This channel digital sound proceing allows the user to control volume 
  
  Specification 
  
  Max OSPL: ≤129dB±3dB Max Sound Output: 117dB±4dB 
  
  Max Sound Gain: 38dB±5dB Frequency range: 450Hz-3000Hz 
  
  Total Harmonic Wave Distortion: ≤10% Input noise: ≤28dB 
  
  Charging time: 4-6H(8H for the first charge) 
  
  Available time: 40H (Depending on amplification power) "OFF"---Power off button "H"-----Low frequency compreion mode "N"-----Normal usage mode "1-4"---Sound volume 
  
  Package included 
  
  
  1x User manual 
  
  1x Black Box 
  
  1 x USB charging cable without the charge head (Recommended with 1-2A charging head) 
  
  Kindly Remind 
  
  1.Adjust volume to the minimum before wearing. 
  
  2.Choose an earplug of slightly bigger size to avoid whistler. 
  
  3.Increase volume gradually to avoid sudden increase in sound. 
  
  4.If you hear a howling, check the ear (silica ) is appropriate and whether the size of plug is tight, the appropriate choice of earplugs and plugged, make sure no air leakage. 5.Keep the ear plug clean.