Bluetooth headphones KL-02 are designed to meet music lovers who like convenience, flexibility, can be worn to exercise Comes with a soft, mellow sound that responds to music lovers like you with sound system Make watching movies, listening to music or playing games more enjoyable. Beautiful design, modern, slim and lightweight. There is a built-in mic to support mobile phone calls. Can be easily carried, convenient, comfortable, not difficult to travel. Headphones that meet the needs of everyday life the best  Features In-Ear Bluetooth Headphones with Stereo Sound System provides surround listening dimensions, quality materials, modern design, beautiful, coverage up to 10 meters. Ambient noise cancellation There is a built-in microphone for hands-free calls with mobile phones. can wear exercise Long standby time up to 120 hours, support ios/Android/windows system and other devices with bluetooth Suitable for listening to music of all genres. It's part of your travel gadget.  Specifications Wireless Version : 5.0 Battery : 120 mAh Type : Stereo In-Ear with MIC Working distance: up to 10 meters Charging time: 2-3 hours, 8 hours of use Frequency Response Range: 20-20kHz Speaker Sensitivity : 98dB Power: Rechargeable battery