TWS-i7S Wireless Bluetooth Headphones, Stereo Sound Cordless Sport Earphone with Charging Case for Smart Phones with IOS or Android System. Multifunction Button: 1. Answer key ( press 1 time ) 2. Hang up key ( press 2 times ) 3. Play button( press 1 time ) 4. Pause button( press 1 time ) 5.Switch machine key ( long press 5 seconds ) Features STRONG COMPATIBLE BLUETOOTH EARBUDS:Compatible with almost all Bluetooth enabled devices, such as iPhone 6, 6plus, 7, 7 plus, 8, 8 plus, X , Pad iPod Nano 7 iPod Touch and Samsung Galaxy S7, S8, S8 Plus, S9, S9 Plus, Google Pixel and other Bluetooth MORE ADVANCED 6904 CHIPS WITH STRONG SIGNAL STEREO SOUND QUALITY: This i7s is more advanced than the old version i7s. Updated 6904 chips with 5.0 bluetooth technology makes stereo sound better. LONG BATTERY LIFE : 4 -5 hours on a single earbud usage , takes 1-2 hours to fully charged. Battery status displayed on IOS device.There is reminding sound when battery is low, and the led would flash in red at the same time. Led light turns blue when fully charged. HOW TO PAIR : Press the multifunctional button of two earphones at the same time until the led flash in blue and red alternately, then double press EITHER ONE of them, there will be a voice prompt that it is ready to pair, please turn on the "Bluetooth" on your cellphone and choose "tws-i7" on your list to connect. Details Item Weight: 0.21384839414 pounds Shipping Weight: 0.21384839414 pounds Manufacturer: Juoos Domestic Shipping: Item can be shipped within U.S. Item color: White