Sound connection on a Bluetooth is pretty important and the seller told me they'd only refund me and not offer an exchange

Nice connection

Did not lose connection once out of 5+ times that I wore them to work out

The bluetooth connection to my iPhone 6+ was almost instantaneous though I did have difficulty making a connection to a several year old iPod.

The version 4.1 doesn't have the ability to dual connection to two devices simultaneously like version 4.2v

:AffordableStable connection, easily paired ( used Samsung Note 8)Good Quality sound with treble, bass ( remember I am not a very loud music person, rather light music only)Good voice qualityCons:Still using for 2-3 weeks , sometimes I struggle for the talk switch on my neck, its just my case

Initial connection to my phone was effortless and the earbuds automatically connect when turned on for each use thereafter