Simply plug the DuFree(SJ402A) unit into the cigarette lighter and you will be able to answer, end, reject, redial, place calls or adjust your speaker volume by the simple push of a button, wherever your phone is in your car.
Especially DuFree(SJ402) support voice announcement function for caller ID
number.

The DuFree(SJ402A) supports voice dialling and allows you to dial your contacts without touching your phone, to allow you to safely concentrate on driving your car.

Features:

Superior full duplex communications quality by DSP

Voice Announcing for Incoming Phone Number

Excellent noise & echo suppression

Bluetooth specification version 1.2 compliant

Supported both handsfree and headset profiles

The best sound clarity with no distortion

Surge prevention circuit system

Easy installation and simple operation

Compatible with all Bluetooth wireless technology enabled phones

Includes a separate microphone that should be positioned away from the speaker for best performance

Specifications
Use