"Samsung HF1000 Bluetooth Visor Car Kit"

The HF1000 has auto volume control and it will adjust its volume in accordance to the level of ambient noise within your environment.

[b]Features:[/b] - Talk time of up to 15 hours - Standby time of up to 1 month - Bluetooth technology Version 2.

1 + EDR - Handsfree Profiles: HFP/HSP - Interface Micro USB.

"Featuring a single microphone for solid noise absorption and multipoint technology which will allow up to 2 mobile users to be connected to the visor unit at any given time.