yw yuwiss bluetooth earpiece for cell phone with mic wireless in ear earbud headphones car headset with 20 hours noise canceling hands free calling compatible driving, iphone, samsung (black) yw yuwiss >technical details: </b> <br> - noise reduction: cvc6.0<br> - bluetooth version: bluetooth v5.0<br> -charge method: power adapter output (dc 5v), recharge battery<br> - charge time: 1.5 hour<br> -powerclass: class 2<br> - bluetooth profiles: headset/habdsfrees/a2dp/vrcp<br> - operation range: up to 33 feet(more than 10 meters) <br> - talk time: 20 hours<br> - music time: 15 hours(in highest volume) <br> - standby time: 300 hours<br> <br> <b>how to stay in your ear: </b> <br> first of all, please make sure the eartip insert into your ear canal first, and then adjust its position until you feel well, also, there are two extra ear hooks that you can assemble. <br> <br> <b>how to pair: </b> <br> 1. before using the earpieces, please charges the item through usb cable<br> 2. press the power button for 5 sec or longer and you will see the red-blue light flashing alternately and a voice will inform you “power on”. it’s default to be bluetooth mode. <br> 3. active your smart phone’s bluetooth mode, and search the headset model#. and then finish connection. <br> <br> <b>how to summon “siri and other voice assistant” </b> <br> 1.please connect the headphones with your iphone/ipad or other android cell phone. <br> 2.press the power button for 3-4 sec and you will hear beep, then you can talk to your siri. <br> <br> <b>package includes:</b><br> 1x bluetooth headset<br> 1x usb charging cable<br> 2x ear hook<br> 3x eartips(s/m/l) <br> 1x user manual<br>