I dunno. I bought a Sony Walkman NWZ-A829 (OK, Apple kicks their ass at naming stuff) way back in 2008, which had built-in Bluetooth, and about a year later bou

I dunno. I bought a Sony Walkman NWZ-A829 (OK, Apple kicks their ass at naming stuff) way back in 2008, which had built-in Bluetooth, and about a year later bought some no-name $25 Bluetooth headphones for use in the gym. Never had any issue with pairing or connection dropping, used that combination for a couple of years before going back to wired.