Discover hands-free all over again with the Smart Single Side Bluetooth with Dual Pairing Crystal Duo. Delivering form and function, the Single Side Bluetooth enhances your wireless experience by providing superb audio quality, VoIP compatibility and a special battery saving feature when not paired. It is designed comfortably to be worn in the ear with echo-cancellation and noise reduction for clear, crisp audio. This stylishly designed Bluetooth headset includes two interchangeable ear hooks for a secure fit. This V2.1 EDR headset is compatible with any Bluetooth enabled phone. This Headset has a function for Multi Pairing for connecting 2 phones and switch between calls. With up to 5 hours of talk time and 6 days of standby time this is the perfect solution for long-lasting communication.