Can be used as a conference speakerphone & handsfree car kit Support secure simple paring Supported Bluetooth profiles: Headset Profile (HSP), Heads-Free Profile (HFP) Multipoint feature allows user to connect 2 devices through Bluetooth at the same time Bluetooth V3.0 + EDR, Class 2 Working range: up to 10 meters Operating frequency band: 2.4 to 2.4 G Hz unlicensed ISM band Battery charging time: about 3 hours Talking time: about 17 hours Standby time: about 1000 hours Rechargeable battery: 3.7V DC, 650m Ah