With this mini stereo Bluetooth earphone, you can conveniently and safely answer calls while driving. It is compatible with all Bluetooth-enabled devices. The compact size makes it convenient to use. High performance stereo Bluetooth headset. Supports voice control and reporting caller ID. Allows you to conveniently answer calls while driving. Compatible with Bluetooth digital devices. Freely switches between music and calls. Compact size for ease of use. When there's phone coming, it will report the caller number and ask whether answer, if you say Yes, the phone will be automatically connected; If No, then hang up automatically. Bluetooth Version V4.0.