Continuous talk time: 10 hours or so;
Frequency range: 2.402GHz-2.480GHZ;
SNR: 90Db lithium battery: built-in 110mA polymer lithium battery;
Audio Harmonic Distortion Less than 0.1%;
Maximum Input Voltage: 5V / DC 500mA;
Headphone output power: 5MW distortion: 0.05%

Sunglass material: ABS & PC which makes it lighter and comfortable for your wearing
How to work: Support bluetooth 3.0 and stereo music playing.To listen to the music and answer/reject calls is so easy
Flexiable operation: The headphone can be slightly adjusted by 270 degree and the earbuds also be turned by 45 degree. These glasses are sized more for men or those with medium to large heads。
Sound quality: It is much better than expected for the price, even had nice bass effects to the music - no distortion or issues with sound/call quality