Digital jewelry embeds technology like microphones, displays, and wireless capabilities into jewelry items. An IBM prototype used several connected jewelry pieces like a necklace with a microphone and bracelet with a display to perform mobile phone functions. Digital jewelry can be used as smart watches with screens, ear rings that function as speakers, or rings with buttons. This bridges the physical and digital worlds and technology may become more integrated with the human body in the future. However, digital jewelry also has limitations like small displays, potential health risks from rays, expensive costs, and non-rechargeable batteries.