Anker SoundBuds Slim+ Bluetooth Headphones | $20 | Amazon | Prime members only
Graphic: Shep McAllister

Our readers voted Anker’s SoundBuds Slims as their favorite affordable Bluetooth headphones, but we may need a recount, as Anker recently released the upgraded SoundBuds Slim+, on sale for just $20 today, for Prime members only.

The biggest change from the original model is the inclusion of AptX encoding, which should improve sound quality with compatible devices. Anker also claims that waterproofing has been improved, though they’re both still rated as IPX5, so any change on that front is likely modest. One thing that hasn’t changed: the seven hour battery, which is excellent for earbuds of this size.