the super small hidden invisible moise cancelling earbuds bluetooth 4.0 earbuds manufacturing   

1.Sport stereo Bluetooth

2.Bluetooth version: Version csr 4.0+EDR/Class2

3.Operating Distance:10 Meters

4.Range of Frequency: 2.4GHz-2.4835GHz ISM Band

5.Operating Rang: Up to 10 Meters

6.Typical Talk Time: 3 hours( Hand free,call conversation)

7.Typical Standby Time: 160 hours

8.Rx sensitivity < -80 dBm (PER 1 %)

9.Rechargeable Li battery:50MAH

10.Compatible with various Bluetooth enabled devices such

as mobile phones, PDAs and Laptops

11.Accessories: usb cable, manual