BEARTWO Updrade Bluetooth Headphones-SX-990 Upgrade version of the SX-991 Bluetooth Headset, classical black+ fluorescent green-more compatible with active modern lifestyle; adjust the function key position to the outside neckband surface, more convenient for using. BEARTWO Foldable Retractable Earbuds with Long-lasting Battery Power Neckband & Retractable Earbuds The Bluetooth Headphones Speaker 2 in 1 with fodable design to make convenience with carrying.The auto retractable earbuds allow you to pull the earbuds to the length you want and the earbuds wire can be pulled up to 28cm(11cm) . Super Longer Battery Time The Bluetooth headphones can provide 18 hours talking time and 16 hours music time helps you enjoy fantastic music for all day continuously during travel and sports Connect Two Divices The bluetooth headphones can connect with 2 bluetooth device at the same time. Support iphone, ipad, Samsung or other bluetooth enabled devices. Sweatproof and more lightweight than other headphones, good for outdoor sports. Vibration and Voice Prompt Bluetooth earbuds can vibrate independently when a phone call comes in and avoid missing incoming calls even in a noisy environment. These wireless bluetooth headphones also support Siri, just need to double click + pick a call. Featured HD & Bass+ Sound Latest Bluetooth technology and CVC noise cancellation Built-in mic for stereo sound and superb bass sound, makes calls clear and stable. You will love the awesome sound of these Bluetooth headphones and they are exactly what you are looking for. Sweatproof Wireless Headphones The neckband headphones is sweatproof, soft silicone material makes the headphones very comfortable to wear, you can use it for outdoor sports exercise, such as running, jogging, walking and etc. Enjoying music when doing sports will be a extremely experience. FAQ For better using experience, we have concluded some frequent customers questions below, please kindly take them for reference if you have any issue while using this headphones. Q:How to change the volume or skip songs? ———A: During the playing or call , long press volume"+" or "-" to change the volume level; during the playing, single press the volume"+" or "-" to skip songs. Q: Why does the headset model never show on the phone?———A: Please try to reboot the headset to repair. (Long press the MFB while charging until the blue light flashes 3 times.), and then clear up your bluetooth device of your phone, the last connect it again. Q: How to activate siri?———A: Open siri interface, then double click the vol"+". Q: How to switch the language with this bluetooth headphone?———A: Pressing the "+“ ”-” two buttons simultaneously in the power-on state will broadcast the language switch. Q: How to pair the bluetooth headphones with 2 mobile phones? A: 1, After pairing the 1st device, turn off its bluetooth; 2, Reboot the headphones, and connect to the 2nd device; 3, After the 2nd device connect successfully, turn on the 1st device's bluetooth and click #SX-990# to connect. >>Check the product instruction at "product package" section step by step show you how to do this. Any other questions pls kindly let us know.