Bluetooth4.1 Music sunglasses,support both headset and hands-free profiles, calling voice and Reporting phone number function when calls coming.It can pair with two different devices simultaneously! This gives you the possibilities for answering calls and listening to music.Perfect combination of bluetooth headphone and sunglasses;Fashion and compact design.Dual speaker stereo sound, CVC noise reduction technology.Support voice dial and receive.Super longtime standby 100 hours.Built-in 180mha capacity rechargeable Li-ion battery.