Description: 
<br />Size 3*10*13.5cm
<br />Weight:40g
<br />Standard Bluetooth 4.0+EDR
<br />Bluetooth profilesA2DP,HFP,HSP
<br />HCI interface USB 1.2/2.0
<br />Output power 0 ~ +4dBm 
<br />Receiving sensitivity 75dB
<br />Operation class 2 
<br />Transmission range ¡Ý10 meters
<br />Frequency band:2.4G ISM band 
<br />Connection:Piconet / Scatternet Support
<br />Audio codec:16bit  codec
<br />Working voltage:5V
<br />Package Includes:
<br />1 X Wireless Bluetooth USB CSR Dongle Adapter 
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<br />NOTE:As the effect varies from monitor to monitor, there is irrevocable slightly difference in colors between the color showed on your monitor and the real one, So if dear you can not accept this very little difference, be cautious before you making the orders.thanks for understanding.