Sound Principle: Moving coil
<br />Impedance: 32 
<br />Connection port: USB
<br />Features: Bluetooth, support for music.
<br />Frequency response range: 20-24KHz
<br />Sensitivity: -38db
<br />Bluetooth Version: Bluetooth 4.2
<br />Wear Style: In-ear (It can be used as pairs or you can use them as 2 single earphones)
<br />Headphone Plug Type: Wireless
<br />Connectivity: Wireless
<br />Talk/music time: about Keeping 5 hours
<br />Charger Box: 1500mAh, fast charging (can be charged into 100% in 1 hour)
<br />Battery Capacity:65mAh
<br />Features:
<br />Type: Double Earbuds with Power Bank
<br />Superb sound quality headset with Bluetooth V4.2+CSR for best stereo sound and superb bass sound. Clear high & low volume. With the built-in mic you can easily take calls. Superb microphone quality.
<br />Larger bluetooth range make the mini headphones extraordinary, up to 30ft Bluetooth range in the open space, plugging your phone in to listen to music is unnecessary. You can share it with people around you. That Would Be Wonderful!
<br />With easy to use buttons allows Play/Pause on all your music tracks without reaching your phone, super quick pairing with all Android and iOS Devices.
<br />Optimized for extra comfort and fit better in ear earbuds, ease the problem of popping out, soft material to protect ears, make your phone call and enjoy music time more comfortably. Sweatproof Construction is Perfect for sports, running, jogging & gym exercise, watching TV, or Sleep.
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<br />Package included: (with retailer box)
<br />2 x Bluetooth Earphone 
<br />1 x 1500mAH Charger Box
<br />1 x Charging Cable
<br />1 x Bag
<br />3 pairs of headphones cap