Feature 

1. Small And Invisible,Left &Right ear adjustability
   2. Discreet thin-wire design
   3. Intelligent Noise Reduction
   4. Equipped 4 different sizes earplugs
   5. One key operation
   6. Rechargeable battery for long time use
   7. Support two sound mode
   8.Support Volume control, reduce howling
   9.USB Rechargable with Adapter

Product Parameters / Specification  

1.Product size  43x15x10 mm

2.Weight 4 g

3.Max. saturation sound pressure level(SSPL) 130dB±4dB

4.Full on Acoustic Gain F=1600Hz,45±5dB

5.Total Harmonic Distortion(THD) F>1000H 15% F<1000H 10%

6.Frequency Response 450-3500 Hz

7.Equivalent Input Noise 32 dB

8.Battery  Rechargeable

9.Battery Current Drain 4 mA

10.Estimated Battery Life 48 Hours

11.Rated Voltage D.C 1.5V