BT standard BT V 2.0
  BT class II 20 meters (in open space)
  I/O interface USB version 2.0/1.1
  Dimensions 52.8 x 17.5 x 9.5 mm
  Weight 3.7 g
  Frequency range 2.402 Hz - 2.480 GHz
  Receive sensitivity -80 dBm
  TX power 0 dBm
  Range 100 M
  Input power 5V from  USB port
  System Requirement
  Windows XP/2000/Vista/Windows 7 without additional driver.

 

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