Using the advanced bone conduction technology, the headphone conducts the speaker through the bone and transmits sound to the bone near the external canal, then to auditory nerve. It avoids the occurrence of ear damage and hearing losing, giving your healthy listening. 
<br />
<br />type 1:
<br />
<br />Features:
<br />[Operating Principle]
<br />No eardrum damage
<br />
<br />[Bluetooth Connection & Strong Compatibility]
<br />Bluetooth 4.0 is perfectly compatible with almost all Bluetooth-enabled mobile devices ,
<br />
<br />[Multi-point Connection & Hands-free Call]
<br />With Bluetooth 4.0 + EDR chip, it ensures high-fidelity stereo sound quality and stable performance. 
<br />
<br />[Ergonomical Design]
<br />Its U-shaped ergonomical design is suitable for walking, running, climbing, skating, skiing sport, diving, etc. 
<br />
<br />[Endurance Time]
<br />Low consumption, with built-in 200 mAh Polymer battery, it offers up to 6 hours of continuous music and 5 hours of talking time. Standby time is about 240 hours.
<br />
<br />Specifications:
<br />Model: X1
<br />Bluetooth Version: Bluetooth 4.0 + ERD 
<br />Chip:CSR8645
<br />Bluetooth Profile: a2dp, HFP, HSP, AVRCP
<br />Bluetooth Class: Class 2
<br />Frequency Range: 20 20KHz
<br />Mic Dimension: 40 * 20mm
<br />Mic Sensitivity: -40dB±2dB
<br />Mic Impedance: 2.2K
<br />Speaker Sensitivity: 100+-3DB
<br />Effective Range: 10m (33feet)
<br />Battery: 200mAh Polymer battery
<br />Charging Time: about 2 hours
<br />Talking Time: up to 5 hours
<br />Music Playing Time: up to 6 hours
<br />Standby Time: up to 240 hours
<br />Charger Input Voltage: DC 5V
<br />Color: Green / Orange / Black (Optional)
<br />Item Size: Approx. 13 * 12.2 * 5.2cm / 5.12 * 4.80 * 2.05in
<br />Item Weight: Approx. 44g / 1.55oz
<br />Package Size: Approx. 16.5 * 15 * 7cm / 6.50 * 5.91 * 2.76in
<br />Package Weight: Approx. 244g / 8.63oz
<br />
<br />Package List:
<br />1 * Bone Conduction Headset
<br />1 * USB Cable
<br />1 * Headband
<br />
<br />type 2:
<br />
<br />Main Features:
<br />
<br />No eardrum damage,
<br />Noise Reduction echo and cancellation technology ensure clear sound quality,
<br />Built-in high-performance Microphone and Speaker, 
<br />Sweat-resistant design with Nanotechnology (Up to IPX7) immerse you in sports and music, no need to worry about sweat and water,
<br />Supports hands-free calls,
<br />Compatible with almost all Bluetooth-enabled mobile devices,
<br />Creative ergonomics design, balance wear, tight on the ear,
<br />Powered by the included micro USB port.
<br />
<br />Specifications:
<br />Model Number: YKL-701  
<br />Bluetooth Version: Bluetooth 4.0
<br />Supports HSP, HFP, A2DP, AVRCP protocol  
<br />Frequency Response: 20Hz-2000Hz
<br />Sensitivity: 123 ± 5dB
<br />Operation range: Up to 10 meters  
<br />Built-in 200mAh Rechargeable Li-ion battery
<br />In-put: DC 5V ± 0.1V, 500mA
<br />Music Playing Time: Up to 6 hours (The Music Volume will affect the time)
<br />Standby time: 30 days
<br />Charging Time: 0.5-1 hours   
<br />Color: Black
<br />Main item weight: 49g / 1.72oz
<br />Package size: 22.0 * 17.0 * 6.0cm / 7.28 * 5.82 * 2.36in
<br />Package weight: 236g / 8.32oz
<br />
<br />Package list:   
<br />1 * Bond Conduction Wireless Headphone
<br />1 * USB Cable
<br />1 * User Manual<p> <b><b><img src="https://contestimg.wish.com/api/webimage/594226487b85be10b5b2b952-large.jpg" noproxy><img src="https://contestimg.wish.com/api/webimage/594226487b85be10b5b2b952-1-large.jpg" noproxy><img src="https://contestimg.wish.com/api/webimage/594226487b85be10b5b2b952-2-large.jpg" noproxy><img src="https://contestimg.wish.com/api/webimage/594226487b85be10b5b2b952-17-large.jpg" noproxy><img src="https://contestimg.wish.com/api/webimage/594226487b85be10b5b2b952-18-large.jpg" noproxy><img src="https://contestimg.wish.com/api/webimage/594226487b85be10b5b2b952-20-large.jpg" noproxy><img src="https://contestimg.wish.com/api/webimage/594226487b85be10b5b2b952-21-large.jpg" noproxy><img src="https://contestimg.wish.com/api/webimage/594226487b85be10b5b2b952-22-large.jpg" noproxy><img src="https://contestimg.wish.com/api/webimage/594226487b85be10b5b2b952-23-large.jpg" noproxy><img src="https://contestimg.wish.com/api/webimage/594226487b85be10b5b2b952-32-large.jpg" noproxy><img src="https://contestimg.wish.com/api/webimage/594226487b85be10b5b2b952-33-large.jpg" noproxy><img src="https://contestimg.wish.com/api/webimage/594226487b85be10b5b2b952-35-large.jpg" noproxy><img src="https://contestimg.wish.com/api/webimage/594226487b85be10b5b2b952-37-large.jpg" noproxy><img src="https://contestimg.wish.com/api/webimage/594226487b85be10b5b2b952-42-large.jpg" noproxy><img src="https://contestimg.wish.com/api/webimage/594226487b85be10b5b2b952-43-large.jpg" noproxy><img src="https://contestimg.wish.com/api/webimage/594226487b85be10b5b2b952-50-large.jpg></b></b></p>