Sunvito Ultra Small Bluetooth 4.0 Headset Headphone Earphone Mini Invisible in-Ear Wireless Headphones Support Hands-Free Calling for Smartphones with Bluetooth (Fleshcolor) With compact portable design, it is the most mini Bluetooth headset;High performance stereo Bluetooth headset, small, lightweight and stylish Built in HD and sensitivity microphone.No lights after connection.Idea for in car calling or working use. Perfect for stealth listening or watching at work It can be connected with two smartphone at the same time.The wireless range up to 10 meters on open air.The headset will be connect automatically with a phone paired previously.With Listening to music,calling,voice prompt functions. Work with most bluetooth-enabled devices,such as iPhone,iPad,Samsung Sony HTC LG Blackberry and most Android smartphones Compared with the conventional bluetooth headset, charging speed is increased by 50%, save your charging time.