Technical Parameters:
1， the bluetooth version: V4.0 V3.0 + EDR compatibility， V2.1， V1.1
2， the chipset: CSR BC8645
3， the transmission power: Class2
4， the transmission frequency: 2.4 GHz
5， transmission distance， more than 10 meters
6， and the talking time: 3 ~ 4 hours
7， the standby time: 120 hours
8， support the file format: A2DP， AVRCP， HSP and HFP

Product Features:
1， acme mini， small light
2， bluetooth 4.0 version
3， A2DP， support the music play
4， Multipoint Connection， the Connection 2 mobile phone at the same time
5， Siri Control， intelligent voice Control
6， apt - X Codec， nondestructive sound transmission

Packing:
1 x ST-11 bluetooth earphone
1 x 1 set of ear plugs
1 X Retail packaging
1 x USB cable
1 x The instructions