<p><b>Feartures:</p></b> <p><b>1. Security</p></b> <p>a. Ear can easily listen to music when you hear the sound of traffic around, guarantee travel safety;</b> <p>b. Hands free. Bluetooth links, easy to operate, can receive wireless calls on the glasses.</b> <p><b>2. Health</p></b> <p>A Sound passed through directly to the auditory nerve bones, will not cause damage to the ear canal and eardrum, to maximize the protection of hearing;</b> <p>B So that the ear canal is more refreshing, not easy to breed bacteria, does not cause itching ears or ear disease;</b> <p>C.According to their own needs optional lenses in various environments are guaranteed to get the best vision protection</b> <p>D.Our default comes with normal lens,you can buy the suitable Myopic lens to exchange</b> <p><b>3. Comfort</p></b> <p>Ergonomic design, comfortable and secure</b> <p><b>Description</p></b> <p>Lenses colorl:Bright black</b> <p>Frame Material:ABS+PC+silica gel</b> <p>Speaker type:bone conduction speakers </b> <p>Attribute:Polarized</b> <p>Microphone:-40dB ± 3dB</b> <p>Compatible profiles:A2DP, AVRCP, HSP, HFP</b> <p>Transmission distance:33 ft(10m)</b> <p>Battery:rechargeable lithium ion, 250mAh</b> <p>Continuous play:3-4 hours(normal volume)</b> <p>Standby time:10 days</b> <p>Charge time:2 hours </b> <p>Weight:1.128 oz(32g)</b> <p>Water proofing grade: IP67</b> <p>Bluetooth version:CSR4.1,dual bluetooth pairing</b> <p>Working temperatur:-10℃-+50℃ Humidity 0-90%</b> <p><b>Package list</p></b> <p>1x Bone conduction glass</b> <p>2x Transparent lens model</b> <p>1x USB cable for charging</b> <p>1x English User Manual</b> <p>1x Anti skid raised nose pad</b>