headphones Bluetooth Headset earphone Wireless Headphones Stereo Foldable Sport Earphone Microphone headset Handfree MP3 player|card flashlight|headset displaycard programmerUnique Bluetooth Headphones Youth Edition Headset Bluetooth 5.0 Xiaomi Mi Bluetooth Earphone Build-in Mic Handfree MP3 player1. Bluetooth + MP3 function support stereo music playing, phone calling...2. Support all audio devices that have Bluetooth capability, such as, cell phone ,tablet PC,laptop,computer etc.3. 3.5mm audio jack, provides a simple wired connection of a variety of devices without Bluetooth.4. Allow you to answer or reject phone calls anytime and anywhere.5. Charged via USB, rechargeable battery, convenient and practical.6. Playing time up to 15 hours, and continue talk time up to 10 hours, standby time up to 250 hours.7. Good quality, foldable design and adjustable length hinges, very comfortable to wear and easy to carry.8. Best choice for listening music, watching movie, chatting online etc.9. with?SD card insert,without any bluetooth device,can still enjoy music any time any where.10.Cool shinning look adds the popular feel.?VersionV5.0Frequency2.40GHz-2.48GHzPower?4?dBm,?class?2Effective?range10MSensitivity-84dBm?/?0.1%?BERFrequency?response20?Hz?-?20?KHzS/N?rate70?dBDistortion0.10%Speaker?size40mm?supportA2DP?1.2,?AVRCP?1.0,?HSP,?HSF?1.5Voltage3.7VDC?(built-in?400MAH?rechargeable?battery)talking?time15?hourstandby?time250hourcharge?time3-3.5?hourcurrent40?mAoperate?temperature-4?~?+131F(-20?~?+55C)1.How to charge this headset?Connect your computer and headphone with the USB cable.?2.How to start the headset and listen the music on the computer?Please be sure your computer have a bluetooth function and turn on the bluetooth, then press headphones ON/OFF key and you will see the blue light blinking and get ready to pair, search and pair until connected. Use your computer to start music and enjoy it with the headset.?3. How to operate the bluetooth headphone with mobile phone?a.Turn on bluetooth on mobile phone,press headphones ON/OFF key and you will see the blue light blinking and get ready to pair, search and pair until connected.?b. If someone call you, you just need press the Hang up/Pause button, and you can chat with your friend on the phone. Finished your talking, you just need press the?Hang up/Pause?button, and you can continue your music.?4.How to use the FM function?Just press the MEQ button on the headset it will change to FM mode, press the "PAUSE"?button to scan radio automatically, and short?press "Volume+" and "Volume-" to choose scanned radio.5.How to use the MP3 function?Just?insert the TF card into the slot, music will play directly.(we don't provide TF card)?Packing list:1 x the colorful bluetooth headset (Please choose color)1 x micro USB charge cable1 x instruction guideNote:NO audio cable and SD card include in the packageThank you:)?1> Item will be shipped in 1-2 working days upon receipt of payment,2> Free shipping :we usually delivery by China post airmail,it will takes 10-25 working days.3> By express(EMS/DHL/FEDEX/UPS etc.):usuallly it will take 3-7 working days