Built-in DSP audio processing system, can be a very good eliminate Noise and echo, to ensure clear communication, and music.
Bluetooth version:V4.0 + EDR. Can talk, listening to music
Small and light, stealth design.
Battery type:50mA rechargeable lithium battery
2 in a row, to the telegraph, voice prompt operation

Technical Details

Size (LWH): 3.2 inches, 3.2 inches, 1.3 inches
Product Details
Product Dimensions: 3.2 x 3.2 x 1.3 inches
Shipping Weight: 0.02 pounds (View shipping rates and policies)
ASIN : B010D4L2SQ