How to connect: 
1. Plug in the earphones to your iPhone.
2. Go to Settings > Bluetooth (turn on) > Select "Earphone or Lightning" 
3. If you want to link another iPhone, you must disconnect the Bluetooth link from the original iPhone first and plug the new iPhone then do the step 2 on the new iPhone.
YOU ONLY HAVE TO DO THIS AT THE FIRST TIME FOR IPHONE 7/8,7/8+,X/XS/XR,XS-MAX)
Product information:
o    Bluetooth Version: 5.0
o    Frequency: 2.4Ghz
o    Adopt the advanced CVC6.0 active noise-cancellation
o    Built-in superior HD microphone provide clear and loud sound
o    Voice prompts: Yes
o    Microphone: Yes 
o   Wired: Yes
Compatibility:
o    Apple iPhone 6
o    Apple iPhone 6 Plus
o    Apple iPhone 6s
o    Apple iPhone 6s Plus
o    Apple iPhone 7
o    Apple iPhone 7 Plus
o    Apple iPhone 8 
o    Apple iPhone 8 Plus
o    Apple iPhone X 
o    Apple iPhone XR
o    Apple iPhone XS
o    Apple iPhone XS-MAX
Package includes:
o 1x Pack OEM Quality Headphones Bluetooth Earbuds Headsets for
Apple iPhone 7/8,7/8+, x/xs/xr ,xs-max. or o 3.5MM Jack Headphones Earbuds Headsets for iPhone 5/6 or Androids Phones
Warranty:
100% Satisfaction Guaranteed.
60 Days Return/Exchange Accepted.
Free Return shipping.
15% restocking fees may apply if the items have been opened/used
Payment Policy:
We Accepted Visa, Master, Amex, Paypal etc.
Item will be shipped immediately on the same or next business day of receiving full payment
Shipping Policy:
Shipping within the United States ONLY
No International Shipping
USPS Tracking Will be Provided Automatically by the eBay System
Returns Policy:
You may return the item within the first 14 Days if product is Defective
If you need return, please check twice to confirm the item does not work and send us a message using the eBay system , let us know the detailed problem. An RMA must be issue.
We ONLY accept the return with all original package. Please make sure the item have NO man-made sabotage. If your purchased item is in improper condition, please NOTE that the shipping will not be refunded, all return shipping fee should paid by the buyer unless item DOA.
About Us:
We sell good quality and low price items. You will get what you need here.
We work for a Positive Feedback, and we would like to offer a great customer service. If you have a problem please send us a question.
Business Hours 10:00AM to 5:30PM Monday to Friday
IF YOU HAVE ANY CONCERNS, PLEASE CONTACT US FIRST USING EBAY, BEFORE LEAVING ANY NEGATIVE FEEDBACK, GIVE US A CHANCE TO SOLVE YOUR PROBLEMS.
THANK YOU!!!