Application: DRIVING GIFTING golfing,boating,biking,,fishing,skiing,mountaineering SUNGLASSESWith Bluetooth headset 1.with bluetooth headset2. can be connect with network telephone,MP3(cell phone have mp3 function ), SKYPE chatting 3. with Inner layer for short sight or presbyopic lenses 4.120 hours standby time, up to 6 hours talking time 5. with 3 legs, easy for changing when charging Bluetooth ...