Band of Regeneration

The Band of Regeneration is an accessory that slowly restores health at a rate of about one HP every 3 seconds. The effect of the Band of Regeneration is stackable, in the sense that equipping multiple increases the amount of HP regeneration. Having 2 of these equipped seem to have the effect of one HP per second. It is worth 1 gold when being sold to any vendor (an NPC that sells or buys items).

The band appears to be a heart stuck on a red ring.

They can be found in undergroud chests, dungeons, or underground jungles.