Latest Bluetooth version 4.1. Combine with 6G CVC Noise Reduction technology, Ensure Hi-Fi Stereo Sound quality and Strong Signal. Latest Neckband style design concept. Newly added foldable function. No need to worry the headset will be break off when you put it in your bag. Just one press to retract the earbuds. The headset cable can be adjust to the best length. Outstanding Battery life. 300 hours standby time, 18 hours talking time and 16 hours music time. Vibration for incoming call. The right side of the headset will vibrating when someone call you. Will never miss any phone call. Easy to use, just turn the headset on enter pairing mode, no need additional operation. Easy to change music and the volume and songs.